Pontryagin cohomology operation
id:
pontryagin-cohomology-operation-282-18279255
title:
Pontryagin cohomology operation
text:
In mathematics, a Pontryagin cohomology operation is a cohomology operation taking cohomology classes in H2n(X,Z/prZ) to H2pn(X,Z/pr+1Z) for some prime number p. When p=2 these operations were introduced by Pontryagin (1942) and were named Pontrjagin squares by Whitehead (1949) (with the term "Pontryagin square" also being used). They were generalized to arbitrary primes by Thomas (1956).
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wiki
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encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Pontryagin_cohomology_operation
date created:
date modified:
2021-09-14T18:41:32Z
main entity:
{"identifier":"Q7228372","url":"https://www.wikidata.org/entity/Q7228372"}
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13
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