Lectures

Selected Talks

1. Codes and the MacWilliams Relations, Quadratic Forms, Rings, and Codes, Lens, France, August 31, 2023.

2. MacWilliams Relations, UAB, Spain, June 13, 2023. 

3. Dualities for Finite Groups, Virginia Tech, October 27, 2022.

4. Foundation of Algebraic Coding Theory, 2021 EIMS International Conference on Computational Mathematics, August 26, 2021.

5. The Use of Ideals in Coding Theory, Applications of Computer Algebra, July 27, 2021. 

6. Additive Codes, Non-Commutative Rings and their Applications  VII, July 6, 2021. 

7. G-Codes over Rings, University of Artois, Lens, June 24, 2019.  

8. Codes and MacWilliams Relations, Autonomous University of Barcelona, June 19, 2019.

9. Latin squares, Magic Squares and Tic-Tac-Toe, King's College, November 13, 2018.

10. A new Fermat Question, Luzerne and Lackawanna Counties Mathematics Symposium, Misericordia University, October 7, 2017.

11. Circular Permutations, Conference on Mathematics and Games,  Misericordia University, April 9, 2016.

12. Dualities in Finite Space, Misericordia University, October 3, 2015.

13. A Practical Guide to the MacWilliams Relations, Universite Artois, Lens, France, June 8, 2015.

14. Electronic Communication, Football Pools and Hat Color Games, Muhlenberg College, October 17, 2014.

15. Codes over Rings and Duality, ICM 2014, Ewha University, Seoul, Korea, August 12, 2014.

16. Codes over Local Rings of Order 16 and their Gray Maps, ACA, Fordham University, New York, USA, July 12, 2014.

17. Self Dual Codes over Commutative and Non-Commutative Rings, Algebraic Structures and their Applications, Spineto, Italy, 16 June 2014.

18. Open Questions in Coding Theory, University of Verona, Italy, June 13, 2014.

19. Self-Dual Codes, University of Verona, Italy, June 12, 2014.

20. Foundations of Codes over Rings, University of Verona, Italy, June 11, 2014.

21. Classical Coding Theory, University of Verona, Italy, June 10, 2014.

22. Une nouvelle question Fermatienne, Université Catholique de Louvain, Louvain la Nouve, Belgium, January 20, 2014 (in French).  

23. Ladder Problems, Moravian College, November 12, 2013.

24. Coding Theory and Hadamard Matrices, Misericordia University, September 21, 2013.

25. Open Problems in Coding Theory, Universite d'Artois, Lens, France, July 1, 2013.

26. Non-standard Coding Theory, Universite d'Artois, Lens, France, July 2, 2013.

27. Self-Dual Codes over Frobenius Rings, Universite d'Artois, Lens, France, July 3, 2013.

28. Classical Coding Theory and Codes over Frobenius Rings, Universite d'Artois, Lens, France, July 4, 2013.

29. Self-Dual Codes and Codes over Rings, Autonomous University of Barcelona, April 22, 2013.

30. Japanese Ladders and Games, Eastern Kentucky University Coffee Times Series, February 28, 2013. 

31. Interesting alphabets and weights for algebraic coding theory, Eastern Kentucky University Discrete Mathematics Seminar, February 27, 2013.

32. Coding Theory as Pure Mathematics, Eastern Kentucky University Colloquium, February 26, 2013.

33. Foundations of Algebraic Coding Theory and Avenues of Further Research, ICAAA,  June 22, 2012, Istanbul, Turkey. 

34. Formally self-dual codes, June 18, ACCT 2012, Pomorie Bulgaria. 

35. Cyclic codes over an infinite family of rings, June 5, 2012, Autonomous University of Barcelona, Spain.

36. Generalizations  of  the  rings  of  order  4  and  their  Gray  maps, August 24, 2011, International Conference on Coding and Cryptography, Seoul, Korea.

37. Avenues of research for codes over rings, June 15, 2011, University of Artois, Lens, France.

38. Coding Theory as Pure Mathematics, Combinatorics Seminar, University of Binghamton, November 16, 2010.

39. Coding Theory: Pure and Applied, Mathematics Symposium, Misericordia University, September 25, 2010.

40. The wonderful world of self-dual codes, Discrete Mathematics Day, Misericordia University, September 26, 2009.

41. Self-dual codes over rings, University of Artois, Lens, France, June 30, 2009.

42. Coding theory over rings, Autonomous University of Barcelona, Spain, June 23, 2009.

43. The Nature of Coding Theory, Huangshi Institute of Technology, Huangshi, China, June 5, 2009.

44. Open Problems in Self-Dual Codes, Huazhong Normal University, Wuhan, China, June 5, 2009.

45. Advances in Coding Theory - Codes over Rings, Huazhong Normal University, Wuhan, China, June 4, 2009.

46. Higher Weights for Codes over Rings, AMS special session, Western Michigan University, October 17, 2008.

47. Codes over rings, AMS special session honoring the retirement of Than Ward, Depaul University, Chicago, IL, October 6, 2007.

48. The search for the elusive extremal Type II codes, University of Delaware Discrete Mathematics seminar, Deceber 1, 2006.

49. Optimal Codes over Z_m, Invited lecutre for the 60th Anniversary of the Korean Mathematical Society, Seoul National University, Seoul, Republic of Korea, Oct 27, 2006.

50. Modular Cyclic codes, AMS conference, Univerity of Cincinnati, Cincinnati Ohio, Oct 21, 2006.

51. Tic-Tac-Toe on finite planes, CNRS, Sophia-Antipolis, France, March 2, 2006.

52. Cyclic Codes of even length over the integers modulo 4, SIAM Minisymposium on error-correcting codes, Atlanta, GA, January 5, 2005.

53. Codes, Lattices and Modular Forms, ITW2003, La Sorbonne, Paris, April 3, 2003.

54. Constructing Complex and Quaternionic lattices from codes over rings, Combinatorics seminar, University of Binghamton, March 3, 2003.

55. 36 Officers and Latin Squares, Combinatorics seminar, University of Binghamton, February 20, 2002.

56. A Coding Theoretic Proof of a Part of the Bruck-Ryser Theorem, Combinatorics seminar, University of Binghamton, October 10, 2001.

57. Shadows, lattices and codes, POSTECH University, Pohang, South Korea, August 16, 2001.

58. A very elusive doubly-even code,  POSTECH University, Pohang, South Korea, August 16, 2001.

59. Codes over F_2 + u F_2 and complex lattices,  POSTECH University, Pohang, South Korea, August 17, 2001.

60. The Search for an Extremal Code of Length 72, Combinatorics seminar, University of Binghamton, March 20, 2001.

61. Codes over Rings and Real Lattices, University of Kiel, Germany, Janaury 16, 2001.

62. Higher Weights and Binary Self-Dual Codes, WCC2001, Paris, France, January 12, 2001.

63. Self-Dual Codes and Unimodular Lattices, Lehigh University, November 29, 2000.

64. Shadows and Space, Combinatorics seminar, University of Binghamton, October 18 and October 25, 2000.

65. Codes with a non-Hamming metric and Uniform Distributions, International Workshop on Combinatorics, 12th Franco-Japanese Conference, Zao, Japan, October 8, 2000.

66. Shadows of Codes over Rings of Order 4, Yamagata University, Japan, October 2, 2000.

67. Codes with a Non-Hamming Metric, AMS Special Topic Session, Notre Dame University, April 8, 2000.

68. Codes, Lattices and Shadows, Steklov Institute of the Russian Academy of Sciences, March 10, 1999, St. Petersburg, Russia.

69. Codes of Nets, Vermont Summer Conference of Combinatorics, University of Vermont, June, 1994.

70. Nets and their Codes, AMS Special Topic Session, Lehigh University, April 1992.

Pictures of me lecturing in China and Turkey.