Lemma isinjstntonat (n : nat) : isInjectiveFunction (pr1 : stnset n -> natset). Proof. intros i j. apply subtypePath_prop. Defined.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions.