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A conjecture for the eigenvalues of modular forms under Hecke operators.

5((x^5)_infty^5)/((x)_infty^6)=sum_(m=0)^inftyP(5m+4)x^m, where (x)_infty is a q-Pochhammer symbol and P(n) is the partition function P.

A type of binary tree.

A measure that takes on real values.

A quadratic field Q(sqrt(D)) with D>0.

A matrix for which horizontal and vertical dimensions are not the same (i.e., an m×n matrix with m!=n).

The Ree group R(q) is the automorphism group of a S(2,q+1,q^3+1) Steiner system.

A refinement X of a cover Y is a cover such that every element x in X is a subset of an element y in Y.

A relation R on a set S is reflexive provided that xRx for every x in S.

A reflexive relation.