Three Proofs and a Generalization of the
on a Sequence Arising in Algebraic Geometry
Brian Drake and Ira M. Gessel
Department of Mathematics
Waltham, MA 02454
Center for Combinatorics
P. R. China
We prove and generalize a conjecture of Goulden, Litsyn, and
Shevelev that certain Laurent polynomials related to the solution of
a functional equation have only odd negative powers.
Full version: pdf,
(Concerned with sequences
Received September 17 2006;
revised version received April 10 2007.
Published in Journal of Integer Sequences April 10 2007.
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