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A proof of a conjecture for the number of ramified coverings of the sphere by the torus

I. P. Goulden, D. M. Jackson

math.AGarXiv:math/9902009

Abstract

An explicit expression is obtained for the generating series for the number of ramified coverings of the sphere by the torus, with elementary branch points and prescribed ramification type over infinity. This proves a conjecture of Goulden, Jackson and Vainshtein for the explicit number of such coverings.

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