proposition: Lemma symmetric_mat_row_eq_col {X : UU} {n : nat} (mat : Matrix X n n) (i : ⟦ n ⟧%stn) : is_symmetric_mat mat -> row mat i = col mat i.
proof: Proof. intros H. unfold col, row. exact (toforallpaths _ _ _ (!H) i). Defined.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.Vectors UniMath.Algebra.RigsAndRings UniMath.Algebra.IteratedBinaryOperations UniMath.Algebra.Matrix UniMath.Algebra.Domains_and_Fields UniMath.Algebra.GaussianElimination.Auxiliary UniMath.Algebra.GaussianElimination.Vectors