`BookProof.ChapterGravityProjDirectSum.isCompl_range_of_add_eq_id` {R V : Type*} [CommRing R] [AddCommGroup V] [Module R V] (P Q : V →ₗ[R] V) (hsum : P + Q = LinearMap.id) (hPQ : P

Initializing...

`BookProof.ChapterGravityProjDirectSum.isCompl_range_of_add_eq_id` {R V : Type*} [CommRing R] [AddCommGroup V] [Module R V] (P Q : V →ₗ[R] V) (hsum : P + Q = LinearMap.id) (hPQ : P · Prove2Me