Skip to main content

Computer aided discovery of a fast algorithm for testing conjugacy in braid groups

  • Chapter
Discovering Mathematics with Magma

Part of the book series: Algorithms and Computation in Mathematics ((AACIM,volume 19))

  • 1668 Accesses

Abstract

This chapter describes how Magma [3] was used to investigate and understand a phenomenon observed when implementing a conjugacy test for elements of a braid group. These investigations ultimately lead to the discovery of a new invariant of conjugacy classes in braid groups, to an efficient way of computing this invariant, and in particular to a much more powerful conjugacy test than the one which was originally to be implemented [11].

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 109.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1. E. Artin, Theory of braids, Ann. of Math. (2) 48 (1947), 101–126.

    Article  Google Scholar 

  2. 2. Joan S. Birman, Ki Hyoung Ko, Sang Jin Lee, The in.mum, supremum, and geodesic length of a braid conjugacy class, Adv. Math. 164-1 (2001), 41–56.

    Article  Google Scholar 

  3. 3. Wieb Bosma, John Cannon, Catherine Playoust, The Magma algebra system I: The user language, J. Symbolic Comput. 24 (1997), 235–265. See also the Magma home page at http://magma.maths.usyd.edu.au/magma/.

    Article  MATH  Google Scholar 

  4. 4. Patrick Dehornoy, A fast method for comparing braids, Adv. Math. 125-2 (1997), 200–235.

    Article  Google Scholar 

  5. 5. Patrick Dehornoy, Groupes de Garside, Ann. Sci. école Norm. Sup. (4), 35-2 (2002), 267–306.

    Google Scholar 

  6. 6. Patrick Dehornoy, Luis Paris, Gaussian groups and Garside groups, two generalizations of Artin groups, Proc. London Math. Soc. (3) 79-3 (1999), 569–604.

    Article  Google Scholar 

  7. 7. Elsayed A. El-Rifai, H. R. Morton, Algorithms for positive braids, Quart. J. Math. Oxford Ser. (2) 45-180 (1994), 479–497.

    Article  Google Scholar 

  8. 8. David B. A. Epstein, James W. Cannon, Derek F. Holt, Silvio V. F. Levy, Michael S. Paterson, William P. Thurston, Word processing in groups, chapter 9, Boston: Jones and Bartlett Publishers, 1992.

    Google Scholar 

  9. 9. Nuno Franco, Juan González-Meneses, Conjugacy problem for braid groups and Garside groups, J. Algebra, 266-1 (2003), 112–132.

    Article  Google Scholar 

  10. 10. F. A. Garside, The braid group and other groups, Quart. J. Math. Oxford Ser. (2), 20 (1969), 235–254.

    Article  MATH  Google Scholar 

  11. 11. Volker Gebhardt, A new approach to the conjugacy problem in Garside groups, Journal of Algebra 292-1 (2005), 282–302.

    Article  Google Scholar 

  12. 12. Volker Gebhardt, Braid groups, Chapter 31, pp. 963–1014 in: John Cannon, Wieb Bosma (eds.), Handbook of Magma Functions, Version 2.11, Volume 3, Sydney, 2004.

    Google Scholar 

  13. 13. Ki Hyoung Ko, Sang Jin Lee, Jung Hee Cheon, Jae Woo Han, Ju-sung Kang, Choonsik Park, New public-key cryptosystem using braid groups, pp. 166–183 in: Advances in cryptology-CRYPTO 2000 (Santa Barbara, CA), Lecture Notes in Comput. Sci. 1880, Berlin: Springer, 2000.

    Google Scholar 

  14. 14. Matthieu Picantin, The conjugacy problem in small Gaussian groups, Comm. Algebra, 29-3 (2001), 1021–1039.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2006 Springer

About this chapter

Cite this chapter

Gebhardt, V. (2006). Computer aided discovery of a fast algorithm for testing conjugacy in braid groups. In: Bosma, W., Cannon, J. (eds) Discovering Mathematics with Magma. Algorithms and Computation in Mathematics, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-37634-7_12

Download citation

Publish with us

Policies and ethics