Associate Professor Volker Gebhardt
DAP - Mathematics and Statistics,
Mathematics & Statistics
Associate Professor,
Mathematics & Statistics
Biography
Dr Volker Gebhardt completed his PhD at the University of Essen, Germany in the field of computational group theory. He spent the next four years as a post-doctoral researcher with the Computational Algebra group at the University of Sydney. In 2003-2004, he joined the University of Western Sydney as a casual lecturer and taught several Computing units. In July 2004, he took up a permanent position as a lecturer in Mathematics. His broad research interests lie in various areas of algebra and discrete mathematics; and he is especially interested in questions with an algorithmic or computational flavour.
This information has been contributed by Associate Professor Gebhardt.
Qualifications
- PhD University of Essen
Interests
- Algorithms
- Combinatorial Group Theory
- Combinatorics
- Garside Groups
Organisational Unit (School / Division)
- Mathematics & Statistics
- Mathematics & Statistics
Committees
- SCDMS Work Plan Committee
Contact
| Email: | V.Gebhardt@westernsydney.edu.au |
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| Phone: | (02) 47360 688 |
| Mobile: | |
| Location: | Y.3.55 Penrith (Kingswood) |
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Teaching
Previous Teaching Areas
- 300700 Statistical Decision Making, 2022
Publications
Chapters in Books
- Gebhardt, V. (2006), 'Computer Aided Discovery of a Fast Algorithm for Testing Conjugacy in Braid Groups', Discovering Mathematics with Magma, Springer Verlag 3540376321.
Journal Articles
- Gebhardt, V. and Tawn, S. (2020), 'Constructing unlabelled lattices', Journal of Algebra, vol 545 , pp 213 - 236.
- Bhatia, S., Egri-Nagy, A., Serdoz, S., Praeger, C., Gebhardt, V. and Francis, A. (2020), 'A path-deformation framework for determining weighted genome rearrangement distance', Frontiers in Genetics, vol 11 .
- Cumplido, M., Gebhardt, V., Gonzalez-Meneses, J. and Wiest, B. (2019), 'On parabolic subgroups of Artin-Tits groups of spherical type', Advances in Mathematics, vol 352 , pp 572 - 610.
- Clark, C., Egri-Nagy, A., Francis, A. and Gebhardt, V. (2019), 'Bacterial phylogeny in the Cayley graph', Discrete Mathematics, Algorithms and Applications, vol 11, no 5 .
- Gebhardt, V. and Tawn, S. (2016), 'On the penetration distance in Garside monoids', Journal of Algebra, vol 451 , pp 544 - 576.
- Gebhardt, V. and Tawn, S. (2016), 'Zappa-Szep products of Garside monoids', Mathematische Zeitschrift, vol 282, no 1 , pp 341 - 369.
- Dehornoy, P. and Gebhardt, V. (2014), 'Algorithms for Garside calculus', Journal of Symbolic Computation, .
- Egri-Nagy, A., Gebhardt, V., Tanaka, M. and Francis, A. (2014), 'Group-theoretic models of the inversion process in bacterial genomes', Journal of Mathematical Biology, vol 69, no 1 , pp 243 - 265.
- Berrick, J., Gebhardt, V. and Paris, L. (2014), 'Finite index subgroups of mapping class groups', Proceedings of the London Mathematical Society, vol 108, no 3 , pp 575 - 599.
- Gebhardt, V. and Tawn, S. (2014), 'Normal forms of random braids', Journal of Algebra, vol 408 , pp 115 - 137.
- Gebhardt, V. and Gonzalez-Meneses, J. (2013), 'Generating random braids', Journal of Combinatorial Theory, Series A, vol 120, no 1 , pp 111 - 128.
- Gebhardt, V. (2013), 'Computing growth functions of braid monoids and counting vertex-labelled bipartite graphs', Journal of Combinatorial Theory, Series A, vol 120, no 1 , pp 232 - 244.
- Gebhardt, V. and Gonzalez-Meneses, J. (2010), 'The cyclic sliding operation in Garside groups', Mathematische Zeitschrift, vol 265, no 1 , pp 85 - 114.
- Gebhardt, V. and Gonzalez-Meneses, J. (2010), 'Solving the conjugacy problem in Garside groups by cyclic sliding', Journal of Symbolic Computation, vol 45, no 6 , pp 629 - 656.
- Birman, J., Gebhardt, V. and Gonzalez-Meneses, J. (2008), 'Conjugacy in Garside groups II : structure of the ultra summit set', Groups, Geometry, and Dynamics, vol 2 , pp 13 - 61.
- Gonzalez-Meneses, J. and Gebhardt, V. (2008), 'On the cycling operation in braid groups', Discrete Applied Mathematics, vol 156, no 16 , pp 3072 - 3090.
- Birman, J., Gebhardt, V. and Gonzalez-Meneses, J. (2007), 'Conjugacy in Garside groups I: cyclings, powers and rigidity', Groups, Geometry, and Dynamics, vol 1 , pp 221 - 279.
- Birman, J., Gebhardt, V. and Gonzalez-Meneses, J. (2007), 'Conjugacy in Garside groups III: Periodic Braids', Journal of Algebra, vol 316, no 2 , pp 746 - 776.
- Gebhardt, V. (2006), 'Conjugacy search in braid groups: from a braid-based cryptography point of view', Applicable Algebra in Engineering, Communication and Computing, vol 17, no 40636 , pp 219 - 238.
- Gebhardt, V. (2005), 'A new approach to the conjugacy problem in Garside groups', Journal of Algebra, vol 292, no 1 SPEC. ISS. , pp 282 - 302.
Conference Papers
- Egri-Nagy, A., Francis, A. and Gebhardt, V. (2014), 'Bacterial genomics and computational group theory : the BioGAP package for GAP', International Congress of Mathematical Software, Seoul, South Korea.
Previous Projects
| Title: | Algebraic algorithms for investigating the space of bacterial genomes |
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| Funder: |
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| Western Researchers: | Andrew Francis and Volker Gebhardt |
| Years: | 2013-01-01 - 2015-12-31 |
| ID: | P00020822 |
| Title: | Charting unkown territory: an enumerative approach to Garside groups |
| Funder: |
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| Western Researchers: | Volker Gebhardt |
| Years: | 2013-12-10 - 2015-06-30 |
| ID: | P00021939 |
| Title: | Algorithmic Approaches to Braids and their Generalisations |
| Funder: |
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| Western Researchers: | Volker Gebhardt |
| Years: | 2010-09-30 - 2013-12-30 |
| ID: | P00016834 |