New answers tagged derived-functors
3
votes
derived completion and flat base change
It is always a (quasi-)isomorphism.
In fact, because you are deriving the tensor product you do not need to assume $B$ is flat, and you do not need any assumptions on $A,B,f$, or even to assume that $...
Top 50 recent answers are included
Related Tags
derived-functors × 141derived-categories × 61
homological-algebra × 58
ag.algebraic-geometry × 43
ct.category-theory × 32
at.algebraic-topology × 13
ac.commutative-algebra × 13
homotopy-theory × 11
sheaf-theory × 10
model-categories × 10
abelian-categories × 9
cohomology × 7
group-cohomology × 7
sheaf-cohomology × 7
coherent-sheaves × 7
reference-request × 6
spectral-sequences × 5
adjoint-functors × 5
simplicial-stuff × 4
homology × 4
derived-algebraic-geometry × 4
cohen-macaulay-rings × 4
lie-algebras × 3
etale-cohomology × 3
limits-and-colimits × 3