`BookProof.DensitySpectral.density_diag_eq_kernel_apply` (U : Matrix n n ℂ) (d : n → ℝ) (i : n) : (U * Matrix.diagonal (RCLike.ofReal ∘ d) * Uᴴ : Matrix n n ℂ) i i = ((∑ k, bornKer

Initializing...

`BookProof.DensitySpectral.density_diag_eq_kernel_apply` (U : Matrix n n ℂ) (d : n → ℝ) (i : n) : (U * Matrix.diagonal (RCLike.ofReal ∘ d) * Uᴴ : Matrix n n ℂ) i i = ((∑ k, bornKer · Prove2Me