Zeta functions and Bernstein-Sato polynomials for ideals in dimension two

Details Zeta functions and Bernstein-Sato polynomials for ideals in dimension two Zeta functions and Bernstein-Sato polynomials for ideals in dimension two

2010-12-24

arxiv.org/abs/1012.5437v1

Mathematics

Algebraic Geometry

18 pages, 8 figures

Scientific paper

For a nonzero ideal I of C[x_1,...,x_n], with 0 in supp I, a (generalized) conjecture of Igusa - Denef - Loeser predicts that every pole of its topological zeta function is a root of its Bernstein-Sato polynomial. However, typically only a few roots are obtained this way. Following ideas of Veys, we study the following question. Is it possible to find a collection G of polynomials g in C[x_1,...,x_n], such that, for all g in G, every pole of the topological zeta function associated to I and the volume form gdx on the affine n-space, is a root of the Bernstein-Sato polynomial of I, and such that all roots are realized in this way. We obtain a negative answer to this question, providing counterexamples for monomial and principal ideals in dimension two, and give a partial positive result as well.

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