(A : F →L[ℂ] F) (b : HilbertBasis ℕ ℂ F) : ritzSet (finiteModeRestrict A b) (finiteModeDomain b) = {t : ℝ | ∃ u : F, u ∈ finiteModeDomain b ∧ ‖u‖ = 1 ∧ t = (inner ℂ u (A u) : ℂ).re}

Initializing...

(A : F →L[ℂ] F) (b : HilbertBasis ℕ ℂ F) : ritzSet (finiteModeRestrict A b) (finiteModeDomain b) = {t : ℝ | ∃ u : F, u ∈ finiteModeDomain b ∧ ‖u‖ = 1 ∧ t = (inner ℂ u (A u) : ℂ).re} · Prove2Me