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Article Dans Une Revue Nagoya Mathematical Journal Année : 2016

An inverse mapping theorem for blow-Nash maps on singular spaces

Résumé

A semialgebraic map $f:X\to Y$ between two real algebraic sets is called blow-Nash if it can be made Nash (i.e. semialgebraic and real analytic) by composing with finitely many blowings-up with non-singular centers. We prove that if a blow-Nash self-homeomorphism $f:X\rightarrow X$ satisfies a lower bound of the Jacobian determinant condition then $f^{-1}$ is also blow-Nash and satisfies the same condition. The proof relies on motivic integration arguments and on the virtual Poincar\'e polynomial of McCrory-Parusi\'nski and Fichou. In particular, we need to generalize Denef-Loeser change of variables key lemma to maps that are generically one-to-one and not merely birational.

Dates et versions

hal-01287765 , version 1 (14-03-2016)

Identifiants

Citer

Jean-Baptiste Campesato. An inverse mapping theorem for blow-Nash maps on singular spaces. Nagoya Mathematical Journal, 2016, 223 (01), pp.162-194. ⟨10.1017/nmj.2016.29⟩. ⟨hal-01287765⟩
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