Cohomology, Symmetry, and Perfection

Details Cohomology, Symmetry, and Perfection Cohomology, Symmetry, and Perfection

1992-05-04

arxiv.org/abs/alg-geom/9205002v1

Mathematics

Algebraic Geometry

11 pages, AmS-TeX 2.0

Scientific paper

One of the aims of this paper is to better explain the philosophy behind the computations in [E.Bifet, C.De Concini,C.Procesi Cohomology of Regular Embeddings ] and to place them in a wider conceptual setting. Another aim of the paper is to outline in the last section an ``equivariant'' approach to some key results in the theory of toric varieties. The text of the first three sections follows closely a talk delivered at the University of Copenhagen in July 1989 on the occasion of the Zeuthen Symposium. This paper is dedicated to the memory of my friend Pere Menal and will appear in the Fall 1992 issue, dedicated to his memory, of Publicacions Matem\`atiques, Universitat Aut\`onoma de Barcelona.

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