`BookProof.ChapterLaplacianProduct.diffAt_fderiv` {f : E → ℝ} {x : E} (h : ContDiffAt ℝ 2 f x) : DifferentiableAt ℝ (fderiv ℝ f) x

Initializing...

`BookProof.ChapterLaplacianProduct.diffAt_fderiv` {f : E → ℝ} {x : E} (h : ContDiffAt ℝ 2 f x) : DifferentiableAt ℝ (fderiv ℝ f) x · Prove2Me