Maximal multihomogeneity of algebraic hypersurface singularities

Details Maximal multihomogeneity of algebraic hypersurface singularities Maximal multihomogeneity of algebraic hypersurface singularities

2006-11-08

arxiv.org/abs/math/0611244v1

Manuscr. Math. 123,4 (2007), 373-379

Mathematics

Algebraic Geometry

5 pages

Scientific paper

10.1007/s00229-007-0104-4

From the degree zero part of logarithmic vector fields along an algebraic hypersurface singularity we indentify the maximal multihomogeneity of a defining equation in form of a maximal algebraic torus in the embedded automorphism group. We show that all such maximal tori are conjugate and in one-to-one correspondence to maxmimal tori in the degree zero jet of the embedded automorphism group. The result is motivated by Kyoji Saito's characterization of quasihomogeneity for isolated hypersurface singularities and extends its formal version and a result of Hauser and Mueller.

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