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COMBINATORICA
2010
13 years 3 months ago
2010
Let s, t, m, n be positive integers such that sm = tn. Let M(m, s; n, t) be the number of m
JCT
2006
13 years 8 months ago
2006
Let s = (s1, . . . , sm) and t = (t1, . . . , tn) be vectors of non-negative integervalued functions with equal sum S = m i=1 si = n j=1 tj. Let N(s, t) be the number of m
JCT
2008
13 years 8 months ago
2008
Let s = (s1, s2, . . . , sm) and t = (t1, t2, . . . , tn) be vectors of non-negative integers with m i=1 si = n j=1 tj. Let B(s, t) be the number of m
COMBINATORICS
2007
13 years 8 months ago
2007
We define a higher spin alternating sign matrix to be an integer-entry square matrix in which, for a nonnegative integer r, all complete row and column sums are r, and all partia...