fact: Definition w_algebra: algebra_ob P := w_carrier W ,, s_W.
imports: UniMath.Foundations.All UniMath.MoreFoundations.PartA UniMath.Induction.W.Wtypes UniMath.Induction.W.Core UniMath.Induction.FunctorAlgebras_legacy UniMath.Induction.PolynomialFunctors UniMath.Induction.PolynomialAlgebras2Cells UniMath.CategoryTheory.Core.Functors