On elimination of variables in the study of singularities in positive characteristic

Details On elimination of variables in the study of singularities in positive characteristic On elimination of variables in the study of singularities in positive characteristic

2011-03-17

arxiv.org/abs/1103.3462v1

Mathematics

Algebraic Geometry

35 pages

Scientific paper

The objective of this paper is to discuss invariants of singularities of algebraic schemes over fields of positive characteristic, and to show how they yield the simplification of singularities. We focus here on invariants which arise in an inductive manner, namely by successive elimination of variables. When applied to hypersurface singularities they lead us to a refinement of the notion of multiplicity. The main theorem proves that, under some numerical conditions expressed by these invariants, singularities can be simplified by blowups at centers prescribed by this refinement.

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