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How does group cohomology behaves where coefficient is direct sum?

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#abstract-algebra #group-theory #algebraic-topology #group-cohomology
41
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(symmetric) generators for cohomology group of a del pezzo surface of degree 6

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#group-cohomology #toric-varieties
307
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Group cohomology of the natural action of automorphism group on a finitely generated abelian group

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#abstract-algebra #group-theory #homological-algebra #group-cohomology
323
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Group cohomology topologically with simplicial sets

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#algebraic-topology #homology-cohomology #group-cohomology #simplicial-stuff
143
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Group cohomology of product with swapping (twisting) factors

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#group-theory #group-cohomology
321
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cohomological dimension of groups vs cohomological dimension of subgroups

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#algebraic-topology #homology-cohomology #homological-algebra #group-cohomology
46
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Misunderstanding in definition of homology of groups

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#homology-cohomology #group-cohomology
172
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Intuition behind the Connecting Morphism

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#abstract-algebra #group-theory #group-cohomology
323
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Borel subgroup of $SL_2(\mathbb{Z})$

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#matrices #reference-request #algebraic-topology #homology-cohomology #group-cohomology
216
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Cohomology of free groups topologically

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#algebraic-topology #homology-cohomology #fake-proofs #group-cohomology
276
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Definition of the $0$-coboundary in group cohomology

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#group-cohomology
56
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Chain complexes question between free $K$-modules and almost zero chain.

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#abstract-algebra #group-cohomology
157
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Definitions of Group Cohomology

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#abstract-algebra #group-theory #homology-cohomology #homological-algebra #group-cohomology
423
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Why are principal crossed homomorphisms coboundaries?

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#soft-question #homology-cohomology #intuition #group-cohomology
93
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A spectral sequence with only one index in Atiyah's paper?

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#notation #homology-cohomology #homological-algebra #group-cohomology #spectral-sequences

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