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Teaching
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Publications
Recent (2023 - 2019)
Former (2018 - 1981)
 

Recent Publications (2023 - 2019)

2024

Journal Articles

  1. Volker Diekert , Igor Potapov and Pavel Semukhin
    Decidability of membership problems for flat rational subsets of GL(2,Z) and singular matrices
    SIAM Journal on Computing. :. SIAM, 2024.
    DOI
    BibTeX

Books

  1. Volker Diekert , Manfred Kufleitner , Gerhard Rosenberger and Ulrich Hertrampf
    Elements of Discrete Mathematics
    De Gruyter, 2024.
    © De Gruyter
    BibTeX
  2. Finitely Presented Groups
    De Gruyter, 2024.
    © De Gruyter
    BibTeX

2023

Journal Articles

  1. Laurent Bartholdi , Michael Figelius , Markus Lohrey and Armin Weiß
    Groups with ALOGTIME-Hard Word Problems and PSPACE-Complete Compressed Word Problems
    ACM Trans. Comput. Theory. 14(3–4) Association for Computing Machinery, Febuary 2023.
    DOI
    BibTeX

Conference Articles

  1. Florian Stober and Armin Weiß
    Lower Bounds for Sorting 16, 17, and 18 Elements
    ALENEX 2023, Proceedings, 2023.
    arXiv
    BibTeX

Technical Reports

  1. Caroline Mattes , Alexander Ushakov and Armin Weiß
    Complexity of Spherical Equations in Finite Groups
    2023.
    BibTeX
  2. Florian Stober and Armin Weiß
    Geodetic Graphs: Experiments and New Constructions
    2023.
    BibTeX

2022

Journal Articles

  1. Carlos Camino , Volker Diekert , Besik Dundua , Mircea Marin and Géraud Sénizergues
    Regular matching problems for infinite trees
    Logical Methods in Computer Science. Volume 18, Issue 1, 25:1–25:38 2022.
    DOI
    BibTeX
  2. Alexei Myasnikov and Armin Weiß
    Parallel complexity for nilpotent groups
    Internat. J. Algebra Comput.. 32(5):895–928. 2022.
    DOI
    BibTeX
  3. Paweł Idziak , Piotr Kawałek , Jacek Krzaczkowski and Armin Weiß
    Equation Satisfiability in Solvable Groups
    Theory of Computing Systems. 2022.
    DOI
    BibTeX
  4. Jan Philipp Wächter and Armin Weiß
    An Automaton Group with PSPACE-Complete Word Problem
    Theory of Computing Systems. 2022.
    DOI
    BibTeX

Conference Articles

  1. Heiko Dietrich , Murray Elder , Adam Piggott , Youming Qiao and Armin Weiß
    The Isomorphism Problem for Plain Groups Is in \Sigma_3^P \Sigma_3^P
    39th International Symposium on Theoretical Aspects of Computer Science, STACS 2022, March 15-18, 2022, Marseille, France (Virtual Conference), volume 219 of LIPIcs, pages 26:1–26:14. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2022.
    DOI
    BibTeX
  2. Pawel M. Idziak , Piotr Kawalek , Jacek Krzaczkowski and Armin Weiß
    Satisfiability problems for finite groups
    ICALP 2022, Proceedings, volume 229 of LIPIcs, pages 127:1–127:20. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2022.
    BibTeX
  3. Florian Stober and Armin Weiß
    The Power Word Problem in Graph Products
    Developments in Language Theory - 26th International Conference, DLT 2022, Proceedings, volume 13257 of Lecture Notes in Computer Science, pages 286–298. Springer, 2022.
    DOI
    BibTeX
  4. Caroline Mattes and Armin Weiß
    Improved Parallel Algorithms for Generalized Baumslag Groups
    LATIN 2022: Theoretical Informatics - 15th Latin American Symposium, Guanajuato, Mexico, November 7-11, 2022, Proceedings, volume 13568 of Lecture Notes in Computer Science, pages 658–675. Springer, 2022.
    DOI
    BibTeX

Miscellaneous

  1. Caroline Mattes and Armin Weiß
    Improved Parallel Algorithms for Generalized Baumslag Groups
    DOI
    BibTeX

2021

Conference Articles

  1. Volker Diekert , Henning Fernau and Petra Wolf
    Properties of Graphs Specified by a Regular Language
    Developments in Language Theory - 25th International Conference, DLT 2021, Porto, Portugal, August 16-20, 2021, Proceedings, volume 12811 of Lecture Notes in Computer Science, pages 117–129. Springer, 2021.
    DOI
    BibTeX
  2. Caroline Mattes and Armin Weiß
    Parallel Algorithms for Power Circuits and the Word Problem of the Baumslag Group
    46th International Symposium on Mathematical Foundations of Computer Science, MFCS 2021, August 23-27, 2021, Tallinn, Estonia, volume 202 of LIPIcs, pages 74:1–74:24. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021.
    DOI
    BibTeX

2020

Journal Articles

  1. Stefan Edelkamp , Armin Weiß and Sebastian Wild
    QuickXsort: A Fast Sorting Scheme in Theory and Practice
    Algorithmica. 82(3):509–588. 2020.
    DOI
    BibTeX
  2. Paweł Idziak , Piotr Kawałek , Jacek Krzaczkowski and Armin Weiß
    Equation satisfiability in solvable groups
    arXiv eprints. abs/2010.11788 2020.
    BibTeX
  3. Florian Stober and Armin Weiß
    On the Average Case of MergeInsertion
    Theory Comput. Syst.. 64(7):1197–1224. 2020.
    DOI
    BibTeX

Conference Articles

  1. Jan Philipp Wächter and Armin Weiß
    An Automaton Group with PSPACE-Complete Word Problem
    37th International Symposium on Theoretical Aspects of Computer Science, STACS 2020, March 10-13, 2020, Montpellier, France, pages 6:1–6:17. Schloss Dagstuhl – Leibniz-Zentrum für Informatik, 2020.
    DOI
    BibTeX
  2. Laurent Bartholdi , Michael Figelius , Markus Lohrey and Armin Weiß
    Groups with ALOGTIME-Hard Word Problems and PSPACE-Complete Circuit Value Problems
    35th Computational Complexity Conference, CCC 2020, July 28-31, 2020, Saarbrücken, Germany (Virtual Conference), volume 169 of LIPIcs, pages 29:1–29:29. Schloss Dagstuhl – Leibniz-Zentrum für Informatik, 2020.
    DOI
    BibTeX
  3. Armin Weiß
    Hardness of Equations over Finite Solvable Groups Under the Exponential Time Hypothesis
    47th International Colloquium on Automata, Languages, and Programming, ICALP 2020, July 8-11, 2020, Saarbrücken, Germany (Virtual Conference), pages 102:1–102:19. Schloss Dagstuhl – Leibniz-Zentrum für Informatik, 2020.
    PDF
    DOI
    arXiv
    BibTeX

2019

Journal Articles

  1. Daniele D’Angeli , Dominik Francoeur , Emanuele Rodaro and Jan Philipp Wächter
    Orbits of Automaton Semigroups and Groups
    ArXiv e-prints. abs/1903.00222 2019.
    PDF
    arXiv
    BibTeX
  2. Jan Philipp Wächter and Armin Weiß
    An Automaton Group with PSPACE-Complete Word Problem
    ArXiv e-prints. abs/1906.03424 2019.
    PDF
    arXiv
    BibTeX
  3. Alexei Miasnikov , Svetla Vassileva and Armin Weiß
    The Conjugacy Problem in Free Solvable Groups and Wreath Products of Abelian Groups is in TC^0 ^0
    Theory Comput. Syst.. 63(4):809–832. 2019.
    DOI
    BibTeX
  4. Stefan Edelkamp and Armin Weiß
    BlockQuicksort: Avoiding Branch Mispredictions in Quicksort
    J. Exp. Algorithmics. 24(1):1.4:1–1.4:22. ACM, 2019.
    DOI
    BibTeX
  5. Laurent Bartholdi , Michael Figelius , Markus Lohrey and Armin Weiß
    Groups with ALOGTIME-hard word problems and PSPACE-complete compressed word problems
    arXiv eprints. abs/1909.13781 2019.
    BibTeX
  6. Volker Diekert , Igor Potapov and Pavel Semukhin
    Decidability of membership problems for flat rational subsets of GL(2, \mathbbZ ) and singular matrices
    arXiv eprints. abs/1910.02302 2019.
    arXiv
    BibTeX
  7. Volker Diekert , Igor Potapov and Pavel Semukhin
    Decidability of membership problems for flat rational subsets of GL(2, \mathbbZ ) and singular matrices
    arXiv eprints. abs/1910.02302 2019.
    arXiv
    BibTeX

Conference Articles

  1. Stefan Edelkamp and Armin Weiß
    Worst-Case Efficient Sorting with QuickMergesort
    Proceedings of the Twenty-First Workshop on Algorithm Engineering and Experiments, ALENEX 2019, San Diego, CA, USA, January 7-8, 2019, pages 1–14. SIAM, 2019.
    DOI
    BibTeX
  2. Markus Lohrey and Armin Weiß
    The Power Word Problem
    44th International Symposium on Mathematical Foundations of Computer Science, MFCS 2019, Proceedings, volume 138 of LIPIcs, pages 43:1–43:15. Schloss Dagstuhl – Leibniz-Zentrum für Informatik, 2019.
    BibTeX
  3. Florian Stober and Armin Weiß
    On the Average Case of MergeInsertion
    Combinatorial Algorithms - 30th International Workshop, IWOCA 2019, Pisa, Italy, July 23-25, 2019, Proceedings, pages 417–429. 2019.
    DOI
    BibTeX

News

[Jun’23] The paper “Parallel algorithms for power circuits and the word problem of the Baumslag group” by Caroline Mattes and Armin Weiß has been accepted at Computational Complexity.

[Oct’22] The paper “Lower Bounds for Sorting 16, 17, and 18 Elements” by Florian Stober and Armin Weiß has been accepted at ALENEX 2023.

[Sep’22] The paper “Conelikes and Ranker Comparisons” by Viktor Henriksson and Manfred Kufleitner has been accepted at LATIN 2022.

[Sep’22] The paper “Improved Parallel Algorithms for Generalized Baumslag Groups” by Caroline Mattes and Armin Weiß has been accepted at LATIN 2022.

[Apr’22] The paper “Reachability Games and Parity Games” by Volker Diekert and Manfred Kufleitner has been accepted at ICTAC 2022.

[Apr’22] The paper “Satisfiability Problems for Finite Groups” by Pawel M. Idziak, Piotr Kawalek, Jacek Krzaczkowski and Armin Weiß has been accepted at ICALP 2022.

[Mar’22] The paper “The Power Word Problem in Graph Products” by Florian Stober and Armin Weiß was accepted at DLT 2022.

[Nov’20] Volker Diekert is Partner Investigator in the Australian ARC grant “Geodetic groups: foundational problems in algebra and computer science” at University of Technology Sydney.

[Apr’20] The paper “Groups with ALOGTIME-hard word problems and PSPACE-complete circuit value problems” by Laurent Bartholdi, Michael Figelius, Markus Lohrey and Armin Weiß has been accepted at CCC 2020.

[Apr’20] The paper “Hardness of equations over finite solvable groups under the exponential time hypothesis” by Armin Weiß has been accepted at ICALP 2020.

[Dec’19] The paper “An Automaton Group with PSPACE-Complete Word Problem” by Jan Philipp Wächter and Armin Weiß has been accepted at STACS 2020.

[Nov’19] Carlos Camino was awarded the stuvus Special Prize for exceptional commitment in teaching.

[Jun’19] The paper “The power word problem” by Markus Lohrey and Armin Weiß has been accepted at MFCS 2019.

[May’19] The paper “On the Average Case of MergeInsertion” by Florian Stober and Armin Weiß has been accepted at IWOCA 2019.

[Oct’18] The paper “Worst-Case Efficient Sorting with QuickMergesort” by Stefan Edelkamp and Armin Weiß has been accepted at ALENEX 2019.

[Jun’18] At CCC 2018, Lukas Fleischer received a Best Student Paper Award for his submission “On the Complexity of the Cayley Semigroup Membership Problem”.

[Jun’18] The paper “Testing Simon’s congruence” by Lukas Fleischer and Manfred Kufleitner was accepted at MFCS 2018.

[Jun’18] The paper “The Intersection Problem for Finite Semigroups” by Lukas Fleischer was accepted at DLT 2018.

[Apr’18] The paper “The isomorphism problem for finite extensions of free groups is in PSPACE” by Géraud Sénizergues and Armin Weiß was accepted at ICALP 2018.

[Apr’18] The paper “On the Complexity of the Cayley Semigroup Membership Problem” by Lukas Fleischer was accepted at CCC 2018.

[Jan’18] On March 24-29, 2019 Volker Diekert, Markus Lohrey, Olga Kharlampovich and Alexei Miasnikov will organize the Schloss Dagstuhl Seminar “Algorithmic Problems in Group Theory”.

[Dec’17] The paper “The Intersection Problem for Finite Monoids” by Lukas Fleischer and Manfred Kufleitner was accepted at STACS 2018.

[Jun’17] At the 12th International Computer Science Symposium in Russia (CSR), Lukas Fleischer and Manfred Kufleitner received a Best Paper Award for their publication “Green’s Relations in Finite Transformation Semigroups”, and Armin Weiss received a Best Paper Award for “The conjugacy problem in free solvable groups and wreath product of abelian groups is in $\text{TC}^0$ \text{TC}^0 “ which is joint work with Alexei Miasnikov and Svetla Vassileva.