MacMahon's sum-of-divisors functions, Chebyshev polynomials, and Quasi-modular forms (1010.5769v1)
Abstract: We investigate a relationship between MacMahon's generalized sum-of-divisors functions and Chebyshev polynomials of the first kind. This determines a recurrence relation to compute these functions, as well as proving a conjecture of MacMahon about their general form by relating them to quasi-modular forms. These functions arise as solutions to a curve-counting problem on Abelian surfaces.
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