Parusiński's "Key Lemma" via algebraic geometry

Details Parusiński's "Key Lemma" via algebraic geometry Parusiński's "Key Lemma" via algebraic geometry

1999-10-13

arxiv.org/abs/math/9910064v3

Electronic Research Announcements of AMS 5 (1999), 136-145.

Mathematics

Algebraic Geometry

Only abstract has been changed in this revision. AMS LaTeX 1.1, 10 pages. Author-supplied dvi file available at http://ucs.o

Scientific paper

The following ``Key Lemma'' plays an important role in Parusinski's work on the existence of Lipschitz stratifications in the class of semianalytic sets: For any positive integer n, there is a finite set of homogeneous symmetric polynomials W_1,...,W_N in Z[x_1,...,x_n] and a constant M >0 such that |dx_i/x_i| \le M \max_{j = 1,..., N} |dW_j/W_j| as densely defined functions on the tangent bundle of C^n. We give a new algebro-geometric proof of this result.

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