Cell decomposition and p-adic integration

Details Cell decomposition and p-adic integration Cell decomposition and p-adic integration

2003-01-03

arxiv.org/abs/math/0301023v1

Mathematics

Logic

Thesis made under supervision of Prof. dr. J. Denef, defended on december 18 2002 at KULeuven, Belgium

Scientific paper

A semialgebraic bijection from the field of p-adic numbers to itself minus one point is constructed. Semialgebraic p-adic sets are classified up to semialgebraic bijection. A cell decomposition theorem for restricted analytic p-adic maps is proven, in analogy with the cell decomposition theorem for polynomial maps by Denef. This cell decomposition is used to show that a certain algebra (built up with analytic and subanalytic p-adic functions) is closed under p-adic integration. This solves a conjecture of Denef on parametrized analytic p-adic integrals. Local (analytic) singular series are shown to be in this algebra. Subanalytic p-adic sets are classified up to subanalytic bijection. Multivariate Kloosterman sums are studied modulo powers of p. A qualitative decay rate is obtained when this power goes to infinity. This is a multivariate analogue of a result of Igusa's. Also Presburger groups are studied. A dimension for Presburger sets is defined, Presburger sets are classified up to definable bijection, and elimination of imaginaries is proven. Grothendieck rings of several classes of valued fields are calculated.

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