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15
136
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Universal with respect to property

Published on
#category-theory #soft-question #homological-algebra
89
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Object as object in derived category

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#homological-algebra #derived-categories
305
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Finding a Projective resolution of an element of a Short Exact Sequence

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#commutative-algebra #homological-algebra
86
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Condition for the collection $\operatorname{Nat}(F,G)$ of natural transformations to be a set

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#category-theory #homological-algebra
127
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group cohomology over a trivial module (complex )

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#abstract-algebra #homology-cohomology #homological-algebra #group-cohomology
480
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Geometric interpretation of the cohomology with coefficients in a local system

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#differential-geometry #algebraic-topology #homological-algebra #homotopy-theory
240
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Notation in Serge Lang - Algebra

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#abstract-algebra #algebraic-topology #homological-algebra #homotopy-theory #k-theory
148
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Non-perfect ideal $I$ such that $\mathrm{projdim}(R/I)<\infty$

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#abstract-algebra #commutative-algebra #homological-algebra #noetherian
87
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Characterisation of trivial $n$-extensions

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#abstract-algebra #category-theory #homological-algebra #abelian-categories #derived-functors
126
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About subdivision in homology (demonstration in Lee Introduction to Topological Manifolds, proposition 13.19)

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#general-topology #algebraic-topology #homology-cohomology #homological-algebra
424
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Homotopy invariance of singular cohomology groups

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#reference-request #algebraic-topology #homology-cohomology #homological-algebra
78
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uniqueness of chain map for direct sum of

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#category-theory #homological-algebra #direct-sum
93
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Justification that a function is well defined

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#abstract-algebra #general-topology #algebraic-topology #homological-algebra
37
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Biadditivity of Ext functor using extensions

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#abstract-algebra #category-theory #homological-algebra
261
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Proof of the acyclic model theorem - having trouble

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#algebraic-topology #homological-algebra

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