`BookProof.ChapterResidualStream.norm_residual_sub_self` (f : E → E) (x : E) : ‖residual f x

Initializing...

`BookProof.ChapterResidualStream.norm_residual_sub_self` (f : E → E) (x : E) : ‖residual f x - x‖ = ‖f x‖ · Prove2Me