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math.NT1998
What is a closed-form number?
Timothy Y. Chow
If a student asks for an antiderivative of exp(x^2), there is a standard reply: the answer is not an elementary function. But if a student asks for a closed-form expression for the…
math.CO1998
An independent set axiomatization for symplectic matroids
Timothy Y. Chow
One of the simplest axiomatizations of a matroid is in terms of independent sets. Curiously, no such independent set axiomatization is known for Gelfand and Serganova's WP-matroids…