Research

• My Publications and So Forth

  A list of published and selected unpublished works.
  A list arranged by topics.

• My Research Interests

  Combinatorics, especially matroids, arrangements of hyperplanes, and the topic to which I devote most of my attention, signed graphs and their relatives: see

  The Home Page of Signed, Gain, and Biased Graphs
  at which you will find the Mathematical Bibliography, the Glossary, and a glacially growing list of research problems.
  And see the New York Times.

Other Places, On and Off Site

• Fraktur (German) letters, printed and handwritten forms, from Sheila MacIntyre and Edith Witte, German-English Mathematical Vocabulary, Oliver and Boyd, Edinburgh and London, 1956; second ed. 1966. Higher resolution (2 MB).
• Combinatorics Seminar
• Combinatorics News
  • Gian-Carlo Rota (Our Hero!)
    Beautifully written biography at the National Academy of Sciences.
  • eXtreme Combinatorics: Design theory schedules the XFL season. (February 3, 2001.)
  • A Hat Problem: It sounds like a parlor game -- but it's mathematical coding theory. (April 10, 2001.)
  • Our professors have their own number.
  • The End of a Reign in Graph Theory: W.T. Tutte Dies, May 2, 2002.
  • Archimedes did combinatorics 2200 years ago! Read all about it!
  • Sphere packing: Solved at last? or, What is a proof, really?
  • A statistical analysis of The New Yorker's fiction. (Not combinatorics, but it's an unusual senior thesis!)
  • Obituary of Frank Harary, who liked to be called "Mr. Graph Theory".
  • A book on probability that sounds like fascinating fun, full of anecdotes and math: CHANCES ARE... Adventures in Probability, by Michael Kaplan and Ellen Kaplan (New York Times review).
  • Was Pythagoras really a mathematician at all? Read the controversy in the London Review of Books: "Other Lives", by M.F. Burnyeat.
  • The New York Times discovers signed graphs! Actually, it's the math column by Steven Strogatz (Cornell) called "The Enemy of My Enemy".
• African Mathematics, Multicultural Math, and Math Education
  • A small and selective bibliography, classified by topic, concentrating on the works of Claudia Zaslavsky.
  • A moderately complete chronological bibliography of the works of Claudia Zaslavsky.
  • A brief life of Claudia Zaslavsky.
• Historical
  • N.E. Discrete Mathematics Day at Binghamton (Oct. 10, 2003): Program
  • Binghamton meeting of the A.M.S. (Oct. 11-12, 2003): Program of the Special Session on Dowling Lattices

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