theorem antisym_preserves_sum {A : Fin N → Fin N → ℝ}
(hA : IsAntisymmetric A) :
∀ v : Fin N → ℝ, (∀ i, v i = 1) →
∑ i, ∑ j, A i j * v j = 0 := by
intro v hv
simp_rw [hv, mul_one]
exact antisym_total_sum_zero hAResults 36-46: Conservation Laws and Symmetry Identities