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New posts in homological-algebra
Detail in the proof that sheaf cohomology = singular cohomology
algebraic-topology
homological-algebra
homology-cohomology
sheaf-theory
sheaf-cohomology
Is "Categories and Sheaves" a good followup to Aluffi's "Algebra: Chapter 0"?
algebraic-topology
category-theory
self-learning
homological-algebra
book-recommendation
If $f:R\to S$ is an $R$-algebra and $P$ is a projective $S$-module, then $pd_R(P)\le pd_R(S)$.
homological-algebra
projective-module
Why does $\mathrm{Tor}_0^R(M,N)\cong M\otimes_R N$?
commutative-algebra
homological-algebra
Etymology of Tor and Ext Functors
notation
category-theory
terminology
homological-algebra
Showing an ideal is a projective module via a split exact sequence
commutative-algebra
algebraic-number-theory
homological-algebra
ideals
projective-module
Non-Universal Delta Functors
algebraic-geometry
category-theory
homological-algebra
homology-cohomology
What exactly is a trivial module?
modules
homological-algebra
group-cohomology
Questions about Rickards proof that $D^b_\mathtt{sg}(A) \equiv \mathtt{stmod}(A)$
category-theory
modules
homological-algebra
triangulated-categories
"The Yoneda embedding reflects exactness" is a direct consequence of Yoneda?
category-theory
homological-algebra
exact-sequence
Algebraic topology, etc. for Mac Lane's "Categories for the Working Mathematician"
reference-request
algebraic-topology
soft-question
category-theory
homological-algebra
Coefficients in homology
algebraic-topology
soft-question
terminology
homology-cohomology
homological-algebra
Showing that localization is an exact functor
category-theory
modules
homological-algebra
exact-sequence
localization
Proving that free modules are flat (without appealing projective modules)
abstract-algebra
commutative-algebra
modules
homological-algebra
Induced short exact sequence on wedge product
algebraic-geometry
commutative-algebra
homological-algebra
exact-sequence
Dimensions of vector spaces in an exact sequence
linear-algebra
homological-algebra
Does every l.e.s. "in homology" come from a s.e.s. of complexes?
homological-algebra
Singular homology with coefficients in a ring versus in an abelian group
algebraic-topology
soft-question
homology-cohomology
homological-algebra
abelian-groups
Is the zig-zag lemma natural if the diagram of short exact sequences is only commutative up to homotopy?
category-theory
homological-algebra
Why group cohomology and not group homology?
soft-question
homology-cohomology
homological-algebra
group-cohomology
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