Publications Markus Lohrey
Submitted papers
- Average case analysis of leaf-centric binary tree sources (with Louisa Seelbach and Stephan Wagner)
- Streaming word problems (with Lukas Lück and Julio Xochitemol)
Books and book chapters
| 1. |  | The compressed
                word problem for groups SpringerBriefs in Mathematics, 2014 | 
| 2. |  | Complexity and Randomness in Group
                Theory (with Frédérique
                Bassino, Ilya
                Kapovich, Alexei
                Miasnikov, Cyril
                Nicaud, Andrey
                Nikolaev, Igor
                Rivin, 
                Vladimir Shpilrain, Alexander
                Ushakov and Pascal Weil) De Gruyter, 2020 | 
| 3. |  | Parallel Complexity in Group
                Theory (in Languages and Automata, GAGTA
                Book 3, edited by Benjamin Steinberg) De Gruyter, 2024 | 
Invited papers
- Membership problems in infinite
        groups
        
 Proceedings of CiE 2024, LNCS 14773, pp. 44-59
 © Springer
- Compression techniques in group
        theory
        
 Proceedings of CiE 2021, LNCS 12813, pp. 330-341
 © Springer
- Balancing straight-line programs for strings
        and trees
        
 Proceedings of CiE 2020, LNCS 12098, pp. 296-300
 © Springer
- Sliding window algorithms for regular
        languages (with Moses Ganardi
        and Danny
        Hucke)
        
 Proceedings of LATA 2018, LNCS 10792, pp. 26-35
 © Springer
- Grammar-based tree
        compression
        
 Proceedings of DLT 2015, LNCS 9168, pp. 46-57
 © Springer
- Equality testing of
        compressed strings
        
 Proceedings of WORDS 2015, LNCS 9304, pp. 14-26
 © Springer
- Temporal logics with local
        constraints (with Claudia
        Carapelle)
        
 Proceedings of CSL 2015, pp. 2-13
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- The rational subset
        membership problem for groups: a survey
        
 Proceedings of Groups St Andrews 2013, London Mathematical Society Lecture Note Series 422, pp. 368-389
 © Cambridge University Press
Journal papers
- Parameterized complexity of factorization problems (with 
        Andreas Rosowski)
        
 to appear in Discrete Mathematics and Theoretical Computer Science
- Membership problems in finite
        groups (with 
        Andreas Rosowski and Georg Zetzsche)
        
 Journal of Algebra 675, pp. 23-58, 2025
 © Elsevier
- Regular languages in the sliding
        window model (with Moses Ganardi,
        Danny
        Hucke, Konstantinos Mamouras and
        Tatiana
        Starikovskaya)
        
 TheoretiCS, Volume 4, 2025
 online version at EPIsciences
- Compressed decision problems in hyperbolic
        groups (with 
        Derek Holt and Saul
        Schleimer)
        
 Groups, Geometry, and Dynamics 18(4), pp. 1233-1273, 2024
 © EMS Press
- The power
        word problem in graph products (with 
        Florian Stober and Armin
        Weiß)
        
 Theory of Computing Systems 68, pp. 403-464, 2024 (special issue for DLT 2022)
 © Springer
- Knapsack and the power word problem in solvable
        Baumslag-Solitar groups (with Moses Ganardi
        and Georg Zetzsche)
        
 International Journal of Algebra and Computation 33(3), pp. 617-639, 2023
 © World Scientific
- Subgroup membership in GL(2,Z)
        
 Theory of Computing Systems 2023 (special issue for STACS 2021)
 © Springer
- Complexity of
        word problems for HNN-extensions
        
 Journal of Computer and System Sciences 135, pp. 145-157, 2023 (special issue for FCT 2021)
 © Elsevier
- Exponent
        equations in HNN-extensions (with Michael
        Figelius)
        
 Journal of Groups, Complexity, Cryptology 14(2), 2022
 online version at EPIsciences
- Groups with ALOGTIME-hard word problems and
        PSPACE-complete compressed word problems (with
        Laurent
        Bartholdi, Michael
        Figelius and Armin
        Weiß)
        
 ACM Transactions on Computation Theory 14 (3-4), 2022
 © ACM
- Entropy bounds
        for grammar-based tree compressors (with
        Danny
        Hucke and Louisa
        Seelbach)
        
 IEEE Transactions on Information Theory 67(11), pp. 7596-7615, 2021
 © IEEE Computer Society Press
- Closure properties of knapsack semilinear
        groups (with Michael
        Figelius and Georg
        Zetzsche)
        
 Journal of Algebra 589(1), pp. 437-482, 2022
 © Elsevier
- Balancing
        straight-line programs (with Moses Ganardi
        and Artur
        Jez)
        
 Journal of the ACM 68(4), Article No. 27, 2021
 © ACM
- The smallest grammar problem
        revisited  (with Hideo Bannai,
        Momoko Hirayama, Danny
        Hucke, Shunsuke
        Inenaga, Artur Jez and
        
        Carl Philipp Reh)
        
 IEEE Transactions on Information Theory 67(1), pp. 317-328, 2021
 © IEEE Computer Society Press
- Largest common prefix of a regular tree
        language (with Sebastian
        Maneth)
        
 Journal of Computer and System Sciences 115, pp. 235-245, 2021 (special issue for FCT 2019)
 © Elsevier
- Derandomization for sliding window algorithms
        with strict correctness (with Moses Ganardi
        and Danny
        Hucke)
        
 Theory of Computing Systems 65, pp. 1-18, 2021(special issue for CSR 2019)
 © Springer
- Combined
        compression of multiple correlated data streams for
        online-diagnosis systems (with 
        Simon Meckel, Seungbum Jo, 
        Roman Obermaisser and Simon Plasger)
        
 Microprocessors and Microsystems 77, 2020 (special issue for Euromicro DSD 2019)
 © Elsevier
- Grammar-based compression of unranked
        trees (with Adria Gascon,
        Sebastian
        Maneth, 
        Carl Philipp Reh and Kurt
        Sieber)
        
 Theory of Computing Systems 61(1), pp. 141-176, 2020 (special issue for CSR 2018)
 © Springer
- Universal tree source coding using
        grammar-based compression (with Moses Ganardi,
        Danny
        Hucke and Louisa
        Seelbach)
        
 IEEE Transactions on Information Theory 65(10), pp. 6399-6413, 2019
 © IEEE Computer Society Press
- Knapsack in hyperbolic groups
        
 Journal of Algebra 545, pp. 390-415, 2020
 © Elsevier
- Size-optimal top dag
        compression (with 
        Carl Philipp Reh and Kurt
        Sieber)
        
 Information Processing Letters 147, pp. 27-31, 2019
 © Elsevier
- The complexity of bisimulation and simulation
        on finite systems (with Moses Ganardi
        and Stefan
        Göller)
        
 Logical Methods in Computer Science 14(4), 2018
 online version
- A universal
        tree balancing theorem (with Moses Ganardi)
        
 ACM Transactions on Computation Theory 11(1), Article No. 1, 2018
 © ACM
- Parallel
        identity testing for skew circuits with big powers and
        applications (with Daniel
        König)
        
 International Journal of Algebra and Computation 28(6), pp. 979-1004, 2018
 © World Scientific
- An architecture
        for online-diagnosis systems supporting compressed
        communication (with Seungbum Jo, 
        Damian Ludwig, 
        Simon Meckel, 
        Roman Obermaisser and Simon Plasger)
        
 Microprocessors and Microsystems 61, pp. 242-256, 2018 (special issue for Euromicro DSD 2017)
 © Elsevier
- Circuits and
        expressions over finite semirings (with
        Moses
        Ganardi, Danny
        Hucke and Daniel
        König)
        
 ACM Transactions on Computation Theory 10(4), Article No. 15, 2018
 © ACM
- Knapsack in graph
        groups (with Georg Zetzsche)
        
 Theory of Computing Systems 62(1), pp. 192-246, 2018 (special issue for STACS 2016)
 © Springer
- Path checking for MTL and TPTL over data
        words (with 
        Shiguang Feng and Karin
        Quaas)
        
 Logical Methods in Computer Science 13(3), 2017
 online version
- Evaluation of
        circuits over nilpotent and polycyclic groups
        (with Daniel
        König)
        
 Algorithmica 80(5), pp. 1459-1492, 2018 (special issue for COCOON 2015)
 © Springer
- Constant-time tree traversal and
        subtree equality check for grammar-compressed
        trees (with Sebastian
        Maneth and 
        Carl Philipp Reh)
        
 Algorithmica 80(7), pp. 2082-–2105, 2018 (special issue for DCC 2016)
 © Springer
- Tree
        compression using string grammars (with
        Moses
        Ganardi, Danny
        Hucke and Eric
        Nöth)
        
 Algorithmica 80(3), pp. 885-917, 2018 (special issue for LATIN 2016)
 © Springer
- Constructing small tree grammars and
        small circuits for formulas (with Danny
        Hucke, Artur
        Jez, Moses Ganardi
        and Eric
        Nöth)
        
 Journal of Computer and System Sciences 86, pp. 136-158, 2017
 © Elsevier
- Satisfiability of ECTL* with local tree
        constraints (with Claudia
        Carapelle, 
        Shiguang Feng and Alexander
        Kartzow)
        
 Theory of Computing Systems 61(2), pp. 689-720, 2017 (special issue for CSR 2015)
 © Springer
- Processing
        succinct matrices and vectors (with 
        Manfred Schmidt-Schauß)
        
 Theory of Computing Systems 61(2), pp. 322-351, 2017 (special issue for CSR 2014)
 © Springer
- Approximation of smallest linear tree
        grammars (with Artur Jez)
        
 Information and Computation 251, pp. 215-251, 2016
 © Elsevier
- On Boolean closed full trios and rational
        Kripke frames  (with  
        Dietrich Kuske and 
        Georg Zetzsche)
        
 Theory of Computing Systems 60(3), pp. 438-472, 2017 (special issue for STACS 2014)
 © Springer
- Satisfiability of ECTL* with
        constraints (with Claudia
        Carapelle and Alexander
        Kartzow)
        
 Journal of Computer and System Sciences 82(5), pp. 826-855, 2016
 © Elsevier
- Knapsack and subset
        sum problems in nilpotent, polycyclic, and co-context-free
        groups (with Daniel
        König and 
        Georg Zetzsche)
        
 Contemporary Mathematics 677 (Algebra and Computer Science), pp. 129-144, 2016
 © AMS Press
- 
        Rational subsets and
        submonoids of wreath products (with Benjamin
        Steinberg and 
        Georg Zetzsche)
        
 Information and Computation 243, pp. 191-204, 2015 (special issue for ICALP 2013)
 © Elsevier
- 
        The complexity of
        decomposing modal and first-order theories
        (with Stefan
        Göller and Jean
        Christoph Jung)
        
 ACM Transactions on Computational Logic 16(1), Article No. 9, 2015
 © ACM
- Rational subsets of
        unitriangular groups
        
 International Journal of Algebra and Computation 25(1-2), pp. 113-121 2015
 © World Scientific
- 
        XML compression via
        DAGs (with Mireille
        Bousquet-Mélou, Sebastian
        Maneth and Eric
        Nöth)
        
 Theory of Computing Systems 57(4), pp. 1322-1371, 2015 (special issue for ICDT 2013)
 © Springer
- The
        first-order theory of ground tree rewrite
        graphs (with Stefan
        Göller)
        
 Logical Methods in Computer Science 10(1), paper 7, 2014
 online version
- 
        XML tree structure
        compression using RePair (with Sebastian
        Maneth and 
        Roy Mennicke)
        
 Information Systems 38(8), pp. 1150-1167, 2013
 © Elsevier
- 
        The isomorphism problem on
        classes of automatic structures with transitive
        relations (with 
        Dietrich Kuske and Jiamou Liu)
        
 Transactions of the American Mathematical Society 365, pp. 5103-5151, 2013
 © AMS Press
- Tree-automatic
        well-founded trees (with 
        Martin Huschenbett, Alexander
        Kartzow, and Jiamou Liu)
        
 Logical Methods in Computer Science 9(2), paper 10, 2013
 online version
- 
        Branching-time model
        checking of one-counter processes and timed
        automata (with Stefan
        Göller)
        
 SIAM Journal on Computing 42(3), pp. 884-923, 2013
 © SIAM
- 
        Isomorphism of regular
        trees and words (with Christian
        Mathissen)
        
 Information and Computation 224, pp. 71-105, 2013
 © Elsevier
- 
        Compressed decision
        problems for graph products of groups and applications to
        (outer) automorphism groups (with Niko
        Haubold and Christian
        Mathissen)
        
 International Journal of Algebra and Computation 22(8), 2013
 © World Scientific
- 
        The isomorphism problem for
        omega-automatic trees (with 
        Dietrich Kuske and Jiamou Liu)
        
 Annals of Pure and Applied Logic 164(1), pp. 30-48, 2013
 © Elsevier
- Algorithmics on
        SLP-compressed strings: a survey
        
 Groups Complexity Cryptology 4(2), pp. 241-299, 2012
 © De Gruyter
- 
        Logspace computations in
        Coxeter groups and graph groups (with Volker
        Diekert and Jonathan Kausch)
        
 Contemporary Mathematics 582 (Computational and Combinatorial Group Theory and Cryptography), pp. 77-94, 2012
 © AMS Press
-  Parameter reduction and automata evaluation
        for grammar-compressed trees (with Sebastian
        Maneth and 
        Manfred Schmidt-Schauß)
        
 Journal of Computer and System Sciences 78(5), pp. 1651-1669, 2012
 © Elsevier
-  Model-checking hierarchical
        structures
        
 Journal of Computer and System Sciences 78(2), pp. 461-490, 2012
 © Elsevier
- 
        Automatic structures of
        bounded degree revisited (with 
        Dietrich Kuske)
        
 Journal of Symbolic Logic 76(4), pp. 1352-1380, 2011
 © Cambridge University Press
-  Compressed word problems in
        HNN-extensions and amalgamated products (with
        Niko
        Haubold)
        
 Theory of Computing Systems 49(2), pp. 283-305, 2011
 © Springer
- 
        Leaf languages and string
        compression
        
 Information and Computation 209(6), pp. 951-965, 2011
 © Elsevier
- Tilings and submonoids
        of metabelian groups (with Benjamin
        Steinberg)
        
 Theory of Computing Systems 48(2), pp. 411-427, 2011
 © Springer
-  Fixpoint logics on hierarchical
        structures (with Stefan
        Göller)
        
 Theory of Computing Systems 48(1), pp. 93-131, 2011
 © Springer
- Compressed membership
        problems for regular expressions and hierarchical
        automata
        
 International Journal of Foundations of Computer Science 21(5), pp. 817-841, 2010
 © World Scientific
- Submonoids and rational
        subsets of groups with infinitely many ends
        (with Benjamin
        Steinberg)
        
 Journal of Algebra 324(5), pp. 970-983, 2010
 © Elsevier
- 
        Some natural
        decision problems in automatic graphs (with
        
        Dietrich Kuske)
        
 Journal of Symbolic Logic 75(2), pp. 678-710, 2010
 © Cambridge University Press
- An automata theoretic
        approach to the generalized word problem in graphs of
        groups (with Benjamin
        Steinberg)
        
 Proceedings of the AMS 138, pp. 445-453, 2010
 © AMS Press
- 
        PDL with intersection and
        converse: satisfiability and infinite-state model
        checking (with Stefan
        Göller and Carsten
        Lutz)
        
 Journal of Symbolic Logic 74(1), pp. 279-314, 2009
 © Cambridge University Press
-  Partially commutative inverse
        monoids (with Volker
        Diekert and Alexander Miller)
        
 Semigroup Forum 77(2), pp. 196-226, 2008
 © Springer
-  Word equations over graph
        products (with Volker
        Diekert)
        
 International Journal of Algebra and Computation 18(3), pp. 493-533, 2008
 © World Scientific
-  The
        submonoid and rational subset membership problems for graph
        groups (with Benjamin
        Steinberg)
        
 Journal of Algebra 320(2), pp. 728-755, 2008
 © Elsevier
- 
        Efficient Memory
        Representation of XML Document Trees (with
        Giorgio Busatto and Sebastian
        Maneth)
        
 Information Systems 33(4-5), pp. 456-474, 2008
 © Elsevier
- Algorithmic problems on
        inverse monoids over virtually-free groups
        (with Volker
        Diekert and Nicole Ondrusch)
        
 International Journal of Algebra and Computation 18(1), pp. 181-208, 2008
 © World Scientific
- Rational subsets of
        HNN-extensions and amalgamated free products
        (with Géraud
        Sénizergues)
        
 International Journal of Algebra and Computation 18(1), pp. 111-163, 2008
 © World Scientific
-  First-order and counting theories of
        omega-automatic structures (with 
        Dietrich Kuske)
        
 Journal of Symbolic Logic 73(1), pp. 129-150, 2008
 © Cambridge University Press
-  Inverse
        monoids: decidability and complexity of algebraic
        questions (with Nicole Ondrusch)
        
 Information and Computation 205(8), pp. 1212-1234, 2007
 © Elsevier
- When is a graph
        product of groups virtually-free? (with
        Géraud
        Sénizergues)
        
 Communications in Algebra 35(2), pp. 617-621, 2007
 © Taylor & Francis
-  The
        complexity of tree automata and XPath on grammar-compressed
        trees (with Sebastian
        Maneth)
        
 Theoretical Computer Science 363(2), pp. 196-210, 2006 (special issue for CIAA 2005)
 © Elsevier
-  Logical aspects of Cayley-graphs: The
        monoid case (with 
        Dietrich Kuske)
        
 International Journal of Algebra and Computation 16(2), pp. 307-340, 2006
 © World Scientific
-  Word
        problems and membership problems on compressed
        words
        
 SIAM Journal on Computing 35(5), pp. 1210-1240, 2006
 © SIAM
- 
        Axiomatising
        divergence (with Pedro D'Argenio
        and Holger
        Hermanns)
        
 Information and Computation 203(2), pp. 115-144, 2005
 © Elsevier
-  Decidability and complexity in automatic
        monoids
        
 International Journal of Foundations of Computer Science 16(4), pp. 707-722, 2005 (special issue for DLT 2004)
 © World Scientific
- Complexity results for
        prefix grammars (with 
        Holger Petersen)
        
 RAIRO - Theoretical Informatics and Applications 39(2), pp. 389-399, 2005
 © EDP Sciences
-  Decidable first-order theories of
        one-step rewriting in trace monoids (with
        
        Dietrich Kuske)
        
 Theory of Computing Systems 38(1), pp. 38-81, 2005
 © Springer
-  Logical aspects of Cayley-graphs: The
        group case (with 
        Dietrich Kuske)
        
 Annals of Pure and Applied Logic 131(1-3), pp. 263-286, 2005
 © Elsevier
- 
        Bounded MSC
        communication (with Anca Muscholl)
        
 Information and Computation 189(2), pp. 160-181, 2004
 © Elsevier
-  Existential and positive theories of
        equations in graph products (with Volker
        Diekert)
        
 Theory of Computing Systems 37(1), pp. 133-156, 2004 (special issue for STACS 2002)
 © Springer
- 
        Realizability of high-level
        message sequence charts: closing the gaps
        
 Theoretical Computer Science 309(1-3), pp. 529-554, 2003
 © Elsevier
- A note on the
        existential theory of equations in plain
        groups (with Volker
        Diekert)
        
 International Journal of Algebra and Computation 12, pp. 1-7, 2002
 © World Scientific
- Confluence problems for
        trace rewriting
        
 Information and Computation 170, pp. 1-25, 2001
 © Elsevier
- NP-completeness results
        concerning the transformation of logic programs into
        attribute grammars
        
 Acta Cybernetica 13(3), pp. 209-224, 1998
 © Institute of Informatics, University of Szeged
Conference papers
- FO-query enumeration over SLP-compressed structures of bounded degree (with Sebastian Manet and Markus Schmid)
        
 Proceedings of MFCS 2025
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Finding cycle types in permutation groups with few generators (with 
        Andreas Rosowski)
        
 Proceedings of COCOON 2025, LNCS 15984, pp.367-380
 © Springer
- Streaming in graph products
        (with 
        Julio Xochitemol)
        
 Proceedings of MFCS 2024
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Enumeration for MSO-queries on compressed
        trees (with Markus Schmid)
        
 Proceedings of the ACM on Management of Data, Volume 2, Issue 2 (Proceedings of PODS 2024)
 © ACM arxiv version
- On the complexity of
        diameter and related problems in permutation
        groups (with 
        Andreas Rosowski)
        
 Proceedings of ICALP 2023
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- Low-latency sliding
        window algorithms for formal languages (with
        Moses
        Ganardi, Louis
        Jachiet and 
        Thomas Schwentick)
        
 Proceedings of FSTTCS 2022
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Membership
        problems in finite groups (with 
        Andreas Rosowski and Georg Zetzsche)
        
 Proceedings of MFCS 2022
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Streaming word
        problems (with Lukas Lück)
        
 Proceedings of MFCS 2022
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Exponent equations in
        HNN-extensions (with Michael
        Figelius)
        
 Proceedings of ISSAC 2022, pp. 293-301
 © ACM arxiv version journal version
- Complexity of word problems for
        HNN-extensions
        
 Proceedings of FCT 2021, LNCS 12867, pp.371-384
 © Springer arxiv version journal version
- Subgroup membership
        in GL(2,Z)
        
 Proceedings of STACS 2021
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik journal version
- A comparison of
        empirical tree entropies (with Danny
        Hucke and Louisa
        Seelbach)
        
 Proceedings of SPIRE 2020, LNCS 12303, pp. 232-246
 © Springer arxiv version
- Knapsack and the power word problem in
        solvable Baumslag-Solitar groups (with
        Georg Zetzsche)
        
 Proceedings of MFCS 2020
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Groups with ALOGTIME-hard word problems and
        PSPACE-complete compressed word problems (with
        Laurent
        Bartholdi, Michael
        Figelius and Armin
        Weiß)
        
 Proceedings of CCC 2020
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- The complexity of
        knapsack problems in wreath products (with
        Michael
        Figelius, Moses Ganardi
        and Georg Zetzsche)
        
 Proceedings of ICALP 2020
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Sliding window
        property testing for regular languages 
        (with Moses
        Ganardi, Danny
        Hucke and Tatiana
        Starikovskaya)
        
 Proceedings of ISAAC 2019
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Balancing
        straight-line programs  (with Moses Ganardi
        and Artur
        Jez)
        
 Proceedings of FOCS 2019, pp. 1169-1183
 © IEEE Computer Society Press arxiv version journal version
- The power word problem (with
        Armin
        Weiß)
        
 Proceedings of MFCS 2019
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Combined compression of multiple correlated
        data streams for online-diagnosis systems
        (with Seungbum Jo, 
        Simon Meckel, 
        Roman Obermaisser and Simon Plasger)
        
 Proceedings of Euromicro DSD 2019, pp. 166-173
 © IEEE Computer Society Press journal version
- Largest common prefix of a
        regular tree languages (with Sebastian
        Maneth)
        
 Proceedings of FCT 2019, LNCS 11651, pp. 95-108
 © Springer journal version
- Entropy bounds for grammar-based tree
        compressors (with Danny
        Hucke and Louisa
        Seelbach)
        
 Proceedings of ISIT 2019, pp. 1687-1691
 © IEEE Computer Society Press arxiv version journal version
- Derandomization for sliding window algorithms
        with strict correctness (with Moses Ganardi
        and Danny
        Hucke)
        
 Proceedings of CSR 2019, LNCS 11532, pp. 237-249
 © Springer journal version
- Compressed decision
        problems in hyperbolic groups (with 
        Derek Holt and Saul
        Schleimer)
        
 Proceedings of STACS 2019
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Knapsack in hyperbolic groups
        
 Proceedings of Reachability Problems 2018, LNCS 11123, pp. 87-102
 © Springer arxiv version journal version
- Average case
        analysis of leaf-centric binary tree sources
        (with Louisa
        Seelbach)
        
 Proceedings of MFCS 2018
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Sliding windows over context-free
        languages (with Moses Ganardi
        and Artur Jez
        )
        
 Proceedings of MFCS 2018
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- Randomized sliding window
        algorithms for regular languages (with
        Moses
        Ganardi and Danny
        Hucke)
        
 Proceedings of ICALP 2018
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Grammar-based compression
        of unranked trees (with Adria Gascon,
        Sebastian
        Maneth, 
        Carl Philipp Reh and Kurt
        Sieber)
        
 Proceedings of CSR 2018, LNCS 10846, pp. 118-131
 © Springer arxiv version journal version
- Knapsack problems for
        wreath products (with Moses Ganardi,
        Daniel
        König and 
        Georg Zetzsche)
        
 Proceedings of STACS 2018
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Automata
        theory on sliding windows (with Moses Ganardi,
        Danny
        Hucke, Daniel
        König and Konstantinos Mamouras)
        
 Proceedings of STACS 2018
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Counting problems
        for Parikh images (with Christoph
        Haase and Stefan
        Kiefer)
        
 Proceedings of MFCS 2017
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- An architecture for
        online-diagnosis systems supporting compressed
        communication (with Seungbum Jo, 
        Damian Ludwig, 
        Simon Meckel, 
        Roman Obermaisser and Simon Plasger)
        
 Proceedings of Euromicro DSD 2017, pp. 62-69
 © IEEE Computer Society Press journal version
- Universal tree
        source coding using grammar-based compression
        (with Danny
        Hucke)
        
 Proceedings of IEEE ISIT 2017, pp. 1753-1757
 © IEEE Computer Society Press arxiv version journal version
- Computing quantiles
        in Markov chains with multi-dimensional costs
        (with Christoph
        Haase and Stefan
        Kiefer)
        
 Proceedings of LICS 2017
 © IEEE Computer Society Press
- Circuit
        evaluation for finite semirings (with Moses Ganardi,
        Danny
        Hucke and Daniel
        König)
        
 Proceedings of STACS 2017
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- The complexity
        of knapsack in graph groups (with 
        Georg Zetzsche)
        
 Proceedings of STACS 2017
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version
- Compression of unordered
        XML trees (with Sebastian
        Maneth and 
        Carl Philipp Reh)
        
 Proceedings of ICDT 2017
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- Querying
        regular languages over sliding-windows (with
        Moses
        Ganardi and Danny
        Hucke)
        
 Proceedings of FSTTCS 2016
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- The smallest grammar
        problem revisited (with 
        Danny Hucke and 
        Carl Philipp Reh)
        
 Proceedings of SPIRE 2016, LNCS 9954, pp. 35-49 (Best paper award)
 © Springer journal version
- On the parallel
        complexity of bisimulation over finite systems
        (with Moses
        Ganardi and Stefan Göller)
        
 Proceedings of CSL 2016
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik journal version
- Traversing
        grammar-compressed trees with constant delay
        (with Sebastian
        Maneth and 
        Carl Philipp Reh)
        
 Proceedings of DCC 2016, pp. 546-555
 © IEEE Computer Society Press arxiv version journal version
- Knapsack in graph
        groups, HNN-extensions and amalgamated
        products (with 
        Georg Zetzsche)
        
 Proceedings of STACS 2016
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
 arxiv version
- Tree compression using
        string grammars (with Moses Ganardi,
        Danny
        Hucke and Eric
        Nöth)
        
 Proceedings of LATIN 2016, LNCS 9644, pp. 590-604
 © Springer arxiv version journal version
- Parallel identity testing
        for skew circuits with big powers and
        applications (with Daniel
        König)   
        
 Proceedings of MFCS 2015, LNCS 9235, pp. 445-458
 © Springer arxiv version journal version
- Path checking for MTL and
        TPTL over data words  (with 
        Shiguang Feng and Karin
        Quaas)
        
 Proceedings of DLT 2015, LNCS 9168, pp. 326-339
 © Springer arxiv version journal version
- Evaluating matrix
        circuits (with Daniel
        König)
        
 Proceedings of COCOON 2015, LNCS 9198, pp. 235-248
 © Springer journal version
- Compressed tree
        canonization (with Sebastian
        Maneth and Fabian
        Peternek)   
        
 Proceedings of ICALP 2015, LNCS 9135, pp. 337-349
 © Springer arxiv version
- Satisfiability of ECTL
        with tree constraints 
        (with Claudia
        Carapelle, Alexander
        Kartzow and 
        Shiguang Feng)
        
 Proceedings of CSR 2015, LNCS 9139, pp. 94-108
 © Springer arxiv version journal version
- Constructing small tree
        grammars and small circuits for formulas (with
        Danny
        Hucke and Eric
        Nöth)
        
 Proceedings of FSTTCS 2014, pp. 457-468
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik arxiv version journal version
- Processing succinct
        matrices and vectors (with 
        Manfred Schmidt-Schauß)
        
 Proceedings of CSR 2014, LNCS 8476, pp. 245--258
 © Springer arxiv version journal version
- On Boolean closed full
        trios and rational Kripke frames (with
        
        Georg Zetzsche)
        
 Proceedings of STACS 2014, pp. 530-541
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
 journal version
- Approximation of
        smallest linear tree grammars (with Artur Jez)
        
 Proceedings of STACS 2014, pp. 445-457
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
 journal version
- Satisfiability of CTL*
        with constraints (with Claudia
        Carapelle and Alexander
        Kartzow)
        
 Proceedings of CONCUR 2013, LNCS 8052, pp. 455-469
 © Springer journal version
- Rational subsets and
        submonoids of wreath products (with Benjamin
        Steinberg and 
        Georg Zetzsche)
        
 Proceedings of ICALP 2013, LNCS 7966, pp. 361-372
 © Springer arxiv version journal version
- Compression of rewriting
        systems for termination analysis (with
        Alexander
        Bau, Eric
        Nöth and Johannes
        Waldmann)
        
 Proceedings of RTA 2013, pp. 97-112
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik
- XML compression via
        DAGs (with Sebastian
        Maneth and Eric
        Nöth)
        
 Proceedings of ICDT 2013, pp. 69-80
 © ACM journal version
- The complexity of
        decomposing modal and first-order theories
        (with Stefan
        Göller and Jean
        Christoph Jung)
        
 Proceedings of LICS 2012, pp. 325-334
 © IEEE Computer Society Press journal version
- Tree-automatic
        well-founded trees (with Alexander
        Kartzow and Jiamou Liu)
        
 Proceedings of CiE 2012, LNCS 7318, pp. 363-373
 © Springer arxiv version journal version
- Logspace computations in
        graph groups and Coxeter groups (with Volker
        Diekert and Jonathan Kausch)
        
 Proceedings of LATIN 2012, LNCS 7256, pp. 243-254
 © Springer journal version
- The first-order theory
        of ground tree rewrite graphs (with Stefan
        Göller)
        
 Proceedings of FSTTCS 2011, pp.276-287
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik journal version
- Compressed word problems
        for inverse monoids
        
 Proceedings of MFCS 2011, LNCS 6907, pp. 448-459
 © Springer long version
- Isomorphism of regular
        trees and words (with Christian
        Mathissen)
        
 Proceedings of ICALP 2011, LNCS 6756, pp. 210-221
 © Springer journal version
- Compressed
        membership in automata with compressed labels
        (with Christian
        Mathissen)
        
 Proceedings of CSR 2011, LNCS 6651, pp. 275-288
 © Springer
- Tree structure compression
        with RePair (with Sebastian
        Maneth and 
        Roy Mennicke)
        
 Proceedings of DCC 2011, pp. 353-362
 © IEEE Computer Society Press journal version very detailed version
- The isomorphism problem
        for omega-automatic trees (with 
        Dietrich Kuske and Jiamou Liu)
        
 Proceedings of CSL 2010, LNCS 6247, pp. 396-410
 © Springer journal version
- Compressed conjugacy and
        the word problem for outer automorphism groups of graph
        groups (with Niko
        Haubold and Christian
        Mathissen)
        
 Proceedings of DLT 2010, LNCS 6224, pp. 218-230
 © Springer journal version ( Compressed decision problems for graph products of groups and applications to (outer) automorphism groups)
- The isomorphism problem
        on classes of automatic structures (with
        
        Dietrich Kuske and Jiamou Liu)
        
 Proceedings of LICS 2010, pp. 160-169
 © IEEE Computer Society Press journal version
- Branching-time model
        checking of one-counter processes (with
        Stefan
        Göller)
        
 Proceedings of STACS 2010, pp. 405-416
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik journal version
- Automatic structures of
        bounded degree revisited (with 
        Dietrich Kuske)
        
 Proceedings of CSL 2009, LNCS 5771, pp. 364-378
 © Springer journal version
- Compressed word problems
        in HNN-extensions and amalgamated products
        (with Niko
        Haubold)
        
 Proceedings of CSR 2009, LNCS 5675, pp. 237-249
 © Springer journal version
- Parameter reduction in
        grammar-compressed trees (with Sebastian
        Maneth and 
        Manfred Schmidt-Schauß)
        
 Proceedings of FOSSACS 2009, LNCS 5504, pp. 212-226
 © Springer journal version
- Leaf languages and
        string compression
        
 Proceedings of FSTTCS 2008, pp. 292-303
 online version at Schloss Dagstuhl Leibniz-Zentrum für Informatik journal version
- Euler paths and ends in
        automatic and recursive graphs (with 
        Dietrich Kuske)
        
 Proceedings of AFL 2008, pp. 245-256
 journal version (Some natural decision problems in automatic graphs)
- Hamiltonicity of
        automatic graphs (with 
        Dietrich Kuske)
        
 Proceedings of IFIP-TCS 2008, pp. 445-459
 © Springer journal version (Some natural decision problems in automatic graphs)
- Efficient computation in
        groups via compression (with Saul Schleimer)
        
 Proceedings of CSR 2007, LNCS 4649, pp. 249-258
 © Springer long version
- The submonoid and rational
        subset membership problems for graph groups
        (with Benjamin
        Steinberg)
        
 Proceedings of LATA 2007, pp. 367-378
 journal version
- PDL with intersection
        and converse is 2EXP-complete (with Stefan
        Göller and Carsten
        Lutz)
        
 Proceedings of FOSSACS 2007, LNCS 4423, pp. 198-212
 © Springer journal version (PDL with intersection and converse: satisfiability and infinite-state model checking)
- Infinite state
        model-checking of propositional dynamic logics
        (with Stefan
        Göller)
        
 Proceedings of CSL 2006, LNCS 4207, pp. 349-364
 © Springer journal version (PDL with intersection and converse: satisfiability and infinite-state model checking)
 technical report
- Partially commutative
        inverse monoids (with Volker
        Diekert and Alexander Miller)
        
 Proceedings of MFCS 2006, LNCS 4162, pp. 292-304
 © Springer journal version
- Querying and embedding
        compressed texts (with Yury Lifshits)
        
 Proceedings of MFCS 2006, LNCS 4162, pp. 681-692
 © Springer
- Monadic chain logic over
        iterations and applications to pushdown
        systems (with 
        Dietrich Kuske)
        
 Proceedings of LICS 2006, pp. 91-100
 © IEEE Computer Society Press
- Theories of
        HNN-extensions and amalgamated products (with
        Géraud
        Sénizergues)
        
 Proceedings of ICALP 2006, LNCS 4052, pp. 504-515
 © Springer
- First-order and counting
        theories of omega-automatic structures (with
        
        Dietrich Kuske)
        
 Proceedings of FOSSACS 2006, LNCS 3921, pp. 322-336
 © Springer journal version
- Fixpoint logics on
        hierarchical structures (with Stefan
        Göller)
        
 Proceedings of FSTTCS 2005, LNCS 3821, pp. 483-494
 © Springer technical report journal version
- Tree Automata and XPath
        on compressed trees (with Sebastian
        Maneth)
        
 Proceedings of CIAA 2005, LNCS 3845, pp. 225-237 (Best paper award)
 © Springer journal version (The complexity of tree automata and XPath on grammar-compressed trees)
- Efficient memory
        representation of XML documents (with Giorgio
        Busatto and Sebastian
        Maneth)
        
 Proceedings of DBPL 2005, LNCS 3774, pp. 199-216
 © Springer journal version
- Inverse monoids:
        decidability and complexity of algebraic
        questions (with Nicole Ondrusch)
        
 Proceedings of MFCS 2005, LNCS 3618, pp. 664-675
 © Springer journal version
- Model-checking
        hierarchical structures
        
 Proceedings of LICS 2005, pp. 168-177
 © IEEE Computer Society Press journal version
- Decidability and
        complexity in automatic monoids
        
 Proceedings of DLT 2004, LNCS 3340, pp. 308-320
 © Springer journal version
- Word problems on
        compressed words
        
 Proceedings of ICALP 2004, LNCS 3142, pp. 906-918
 © Springer journal version (Word problems and membership problems on compressed words)
- Word equations over
        graph products (with Volker
        Diekert)
        
 Proceedings of FSTTCS 2003, LNCS 2914, pp. 156-167
 © Springer journal version
- Automatic structures of
        bounded degree
        
 Proceedings of LPAR 2003, LNAI 2850, pp. 344-358
 © Springer
- Decidable theories of
        Cayley-graphs (with 
        Dietrich Kuske)
        
 Proceedings of STACS 2003, LNCS 2607, pp. 463-474
 © Springer journal version (group case) journal version (monoid case)
- Safe realizability of
        high-level message sequence charts
        
 Proceedings of CONCUR 2002, LNCS 2421, pp. 177-192, 2002
 © Springer journal version (Realizability of high-level message sequence charts: closing the gaps)
- On the theory of
        one-step rewriting in trace monoids (with
        
        Dietrich Kuske)
        
 Proceedings of ICALP 2002, LNCS 2380, pp. 752-763, 2002
 © Springer journal version (Decidable first-order theories of one-step rewriting in trace monoids)
- Axiomatising
        divergence (with Pedro D'Argenio
        and Holger
        Hermanns)
        
 Proceedings of ICALP 2002, LNCS 2380, pp. 585-596, 2002
 © Springer journal version
- Bounded MSC
        communication (with Anca Muscholl)
        
 Proceedings of FOSSACS 2002, LNCS 2303, pp. 295-309, 2002
 © Springer journal version
- Existential and positive
        theories of equations in graph products (with
        Volker
        Diekert)
        
 Proceedings of STACS 2002, LNCS 2285, pp. 501-512, 2002
 © Springer journal version
- Word problems for
        2-homogeneous monoids and symmetric logspace
        
 Proceedings of MFCS 2001, LNCS 2136, pp. 500-511, 2001
 © Springer
- On the parallel complexity
        of tree automata
        
 Proceedings of RTA 2001, LNCS 2051, pp. 201-216, 2001
 © Springer
- Implementing Luby's
        algorithm on the Cray T3E (with Jürgen Gross)
        
 High Performance Computing in Science and Engineering, pp. 467-477, Springer 2000
 © Springer
- Word problems and
        confluence problems for restricted semi-Thue
        systems
        
 Proceedings of RTA 2000, LNCS 1833, pp. 172-186, 2000
 © Springer
- Complexity results for
        confluence problems
        
 Proceedings of MFCS 99, LNCS 1672, pp. 114-124, 1999
 © Springer long version
- On the confluence of
        trace rewriting systems
        
 Proceedings of FSTTCS 98, LNCS 1530, pp. 319-330, 1998
 © Springer long version
- Priority and maximal
        progress are completely axiomatisable (extended
        abstract) (with Holger
        Hermanns)
        
 Proceedings of CONCUR 98, LNCS 1466, pp. 237-252, 1998
 © Springer long version
Others
- Equations in
        HNN-extensions
        
 (with Géraud Sénizergues)
- Positive theories of
        HNN-extensions and amalgamated free products
        
 (with Géraud Sénizergues)
- Computational aspects of
        infinite monoids
        
 Habilitation thesis, Stuttgart, 2003
- Das Konfluenzproblem für
        Spurersetzungssysteme (in German)
        
 PhD thesis, Stuttgart, 1999
Impressum
