In topology, a branch of mathematics, Borel's theorem, due to Armand Borel (1953), says the cohomology ring of a classifying space or a classifying stack is a polynomial ring. == See also == Atiyah–Bott formula == Notes == == References == Borel, Armand (1953).
In topology, a branch of mathematics, Borel's theorem, due to Armand Borel (1953), says the cohomology ring of a classifying space or a classifying stack is a polynomial ring. == See also == Atiyah–Bott formula == Notes == == References == Borel, Armand (1953).
Source: Wikipedia "Borel's theorem" · CC BY-SA 4.0
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