Paul Johnson

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1,517 reputation

712

bio	website	math.colostate.edu/~johnson
	location	Fort Collins, CO
	age
visits	member for	4 years, 6 months
	seen	14 hours ago
stats	profile views	825

Professor at Colorado State University

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20 Answers

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18	how does one understand GRR? (Grothendieck Riemann Roch)
17	Products of Conjugacy Classes in S_n
9	An infinite product: combinatorial interpretation
8	Virasoro constraints for the generating function of Hurwitz numbers.
8	Gromov-Witten and integrability.

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1,517 Reputation

+105	An infinite product: combinatorial interpretation
+10	how does one understand GRR? (Grothendieck Riemann Roch)
+30	How “accidental” are equalities between parts of Ehrhart quasi-polynomials? When do they persist to Euler-Maclaurin?
+10	computing monodromy of branched cover of sphere specified by a polynomial

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5 Questions

votes activity newest

23	Nearly all math classes are lecture+problem set based; this seems particularly true at the graduate level. What are some concrete examples of techniques other than the “standard math class” used at the Graduate level?
12	A natural refinement of the $A_n$ arrangement is to consider all $2^n-1$ hyperplanes given by the sums of the coordinate functions. Have you seen this arrangement? Is it completely intractable?
7	Where does the notation $\pi_1(X,x)$ for the fundamental group first appear?
6	How “accidental” are equalities between parts of Ehrhart quasi-polynomials? When do they persist to Euler-Maclaurin?
5	Do fixed point sets in equivariant crepant resolutions have the same cohomology? How about for the specific case of Nakajima quiver varieties?

39 Tags

62 ag.algebraic-geometry × 12	11 partitions × 3
40 co.combinatorics × 9	9 nt.number-theory
24 gromov-witten-theory × 4	9 generating-functions
21 mp.mathematical-physics × 3	8 integrable-systems
21 string-theory × 3	6 pr.probability

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3 Accounts

	MathOverflow	1,517 rep	712
	TeX - LaTeX	177 rep	6
	Academia	101 rep

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