Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cohomology, Symmetry, and Perfection   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.

33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg