`BookProof.ShiftedQuadraticDegenerate.equilibrium_orthogonal_to_kernel` {A : Matrix (Fin d) (Fin d) ℝ} (hsym : ∀ i j, A i j = A j i) {a w : Fin d → ℝ} (ha : ∀ i, ∑ j, A i j * a j =

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`BookProof.ShiftedQuadraticDegenerate.equilibrium_orthogonal_to_kernel` {A : Matrix (Fin d) (Fin d) ℝ} (hsym : ∀ i j, A i j = A j i) {a w : Fin d → ℝ} (ha : ∀ i, ∑ j, A i j * a j = · Prove2Me