fact: Definition vector_stn_proofirrelevance {vec : Vector X n} {i j : stn n} : (stntonat _ i = stntonat _ j) -> vec i = vec j.
imports: UniMath.Combinatorics.FiniteSets UniMath.Combinatorics.Lists UniMath.Combinatorics.Vectors UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Tactics