An Introduction to Homological Algebra
《An Introduction to Homological Algebra》 · 第 34 页 · Definition 2.2.4
A left resolution \(P_\bullet\to M\) is a projective resolution if each \(P_i\) is projective.
An Introduction to Homological Algebra
《An Introduction to Homological Algebra》 · 第 34 页 · Definition 2.2.4
A left resolution \(P_\bullet\to M\) is a projective resolution if each \(P_i\) is projective.
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