`BookProof.NsLagrangianDet.det_rows_sum` {n ι R : Type*} [Fintype n] [DecidableEq n] [Fintype ι] [CommRing R] (v : n → ι → n → R) : (Matrix.of fun r c => ∑ o, v r o c).det = ∑ τ :

Initializing...

`BookProof.NsLagrangianDet.det_rows_sum` {n ι R : Type*} [Fintype n] [DecidableEq n] [Fintype ι] [CommRing R] (v : n → ι → n → R) : (Matrix.of fun r c => ∑ o, v r o c).det = ∑ τ : · Prove2Me