fact: Definition isweqsigmaidtoidsigma {A : UU} {B : A → UU} (c_1 c_2 : total2 B) : isweq (sigmaidtoidsigma c_1 c_2).
imports: UniMath.Foundations.All UniMath.Induction.PolynomialFunctors UniMath.CategoryTheory.Core.Functors UniMath.Induction.FunctorAlgebras_legacy