fact: Definition pointwise_unit (un : X) (unax : isunit op un) : isunit (pointwise n op) (const_vec un).
imports: UniMath.Foundations.PartA UniMath.MoreFoundations.PartA UniMath.Combinatorics.FiniteSequences UniMath.Algebra.BinaryOperations UniMath.Algebra.IteratedBinaryOperations UniMath.Algebra.RigsAndRings