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Integration over the Space of Functions and Poincaré Series Revisited

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Abstract

Earlier (2000) the authors introduced the notion of the integral with respect to the Euler characteristic over the space of germs of functions on a variety and over its projectivization. This notion allowed the authors to rewrite known definitions and statements in new terms and also turned out to be an effective tool for computing the Poincar´e series of multi-index filtrations in some situations. However, the “classical” (initial) notion can be applied only to multi-index filtrations defined by so-called finitely determined valuations (or order functions). Here we introduce a modified version of the notion of the integral with respect to the Euler characteristic over the projectivization of the space of function germs. This version can be applied in a number of settings where the “classical approach” does not work. We give examples of the application of this concept to definitions and computations of the Poincar´e series (including equivariant ones) of collections of plane valuations which contain valuations not centred at the origin.

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Author information

Authors and Affiliations

  1. Faculty of Mechanics and Mathematics, Moscow State University, Moscow, 119991, Russia

    S. M. Gusein-Zade

  2. IMUVA (Instituto de Investigación en Matemáticas), Universidad de Valladolid, Paseo de Belén, Valladolid, 7, 47011, Spain

    F. Delgado & A. Campillo

Authors
  1. S. M. Gusein-Zade
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  2. F. Delgado
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  3. A. Campillo
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Corresponding author

Correspondence to S. M. Gusein-Zade.

Additional information

Published in Russian in Trudy Matematicheskogo Instituta imeni V.A. Steklova, 2018, Vol. 302, pp. 161–175.

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Gusein-Zade, S.M., Delgado, F. & Campillo, A. Integration over the Space of Functions and Poincaré Series Revisited. Proc. Steklov Inst. Math. 302, 146–160 (2018). https://doi.org/10.1134/S008154381806007X

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  • DOI: https://doi.org/10.1134/S008154381806007X

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