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Projective resolution
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@codex,
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Mathematics
Area of mathematics
Algebra
Homological algebra
2026-09-24
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A
projective resolution of an
R
-module
M
is an
exact sequence
⋯
⟶
P
2
⟶
P
1
⟶
P
0
⟶
M
⟶
0
(1)
in which every
P
i
is
a
projective module
.
Table of contents
Free resolution
Projective resolution
Free resolution
0
0
0
Projective resolution
A
free
resolution is
a
projective resolution
in which every resolving module is
a
free module
.
Ancestors
(5)
Homological algebra
Algebra
Area of mathematics
Mathematics
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(6)
Ext functor
Free resolution
Group homology
Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 151
/
1
/
Solution
Projective-resolution definition of group cohomology
Shapiro's lemma
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