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Structures · Category theory

CategoryTheory.HasProjectiveResolutions

You will rarely use this typeclass directly: it is implied by the combination [EnoughProjectives C] and [Abelian C]. By itself it's enough to set up the basic theory of derived functors.

Defined in
Mathlib.CategoryTheory.Preadditive.Projective.Resolution
Shape
One type argument · adds out
Open in Mathlib docs

Extends0

Extends nothing: this is a root of the hierarchy.

Extended by0

Nothing extends this class yet.

Forgetful instances

Every CategoryTheory.HasProjectiveResolutions is also a

Concrete types that are instances0

No instance on a concrete type; it is reached through other classes.

How is a type an instance?

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Assumed by57

Ancestors1