proposition: Lemma hzqrandselfeq ( p : hz ) ( x : hzneq 0 p ) : p = ( p * 1 + 0 ).
proof: Proof. intros. rewrite hzmultr1. rewrite hzplusr0. apply idpath. Defined.
imports: UniMath.PAdics.lemmas UniMath.NumberSystems.Integers UniMath.Foundations.Preamble