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Jan
30
answered Morphism induced by a cellular map between CW-complexes
Jan
1
asked Hochschild homology: change of ground ring
Dec
4
asked Two-sided bar construction for algebras: $B_*(M,R^e,R)$ is quasi-isomorphic to $M\otimes_{R^e}B(R,R,R)$
Oct
13
asked Iterating adjunctions in two different ways
Oct
13
asked Iterating the suspension-loop adjunction in two different ways
Sep
25
asked The Pontrjagin product for homology at the chain level
May
19
asked Spectral sequence for computing the homotopy fixed points in unstable equivariant homotopy theory
Apr
6
answered Duality between Tor and Ext?
Apr
6
asked Computation of $Ext^*_R(k,k)$ as an algebra using a dga-resolution
Mar
9
answered Spin structures, frame bundles, and trivializations over the 2-skeleton
Feb
19
asked Obstruction theory for homotopies
Jan
28
answered Computing $\pi_4(S^3)$ using Serre spectral sequence
Jan
13
asked Computing $\pi_4(S^3)$ using Serre spectral sequence
Sep
8
answered History of category theory
May
30
asked Is $\Omega \tilde X \simeq \Omega_0 X$?
May
16
asked On pushouts and mapping cylinders in exact categories
May
3
answered In a Morita context ($A, B, P, Q, f, g$), why are $P$ and $Q$ projective if $f$ is surjective?
Apr
23
answered What is the suspension used in the Freudenthal suspension theorem?
Apr
20
answered Equivalence of definitions for “normal extension” and how to lift isomorphisms to them
Apr
15
answered When are generalized Severi-Brauer varieties trivial?