fact: Definition alegbra_weq_functoralgebra: algebra σ ≃ algebra_ob F.
imports: UniMath.MoreFoundations.All UniMath.Combinatorics.StandardFiniteSets UniMath.Induction.PolynomialFunctors UniMath.Induction.W.Core UniMath.Induction.W.Wtypes UniMath.Induction.FunctorAlgebras_legacy UniMath.Algebra.Universal.Signatures UniMath.Algebra.Universal.Algebras UniMath.Algebra.Universal.HVectors UniMath.Algebra.Universal.Terms