proposition: Lemma ismultmonoidfun_restriction_section : @ismonoidfun (rigmultmonoid (section_commring U)) (rigmultmonoid (section_commring V)) restriction_section.
proof: Proof. use make_ismonoidfun. - intros s t. apply subtypePath_prop, idpath. - apply subtypePath_prop, idpath. Qed.
imports: UniMath.Algebra.RigsAndRings UniMath.Algebra.RigsAndRings.Ideals UniMath.MoreFoundations.AxiomOfChoice UniMath.MoreFoundations.Subtypes UniMath.Topology.Topology UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Categories.Commring UniMath.AlgebraicGeometry.Topology UniMath.AlgebraicGeometry.SheavesOfRings