fact: Definition isconnected_equiv' (A : Type) {B : Type} (f : A <~> B) : IsConnected O A -> IsConnected O B := isconnected_equiv A f.
imports: HoTT.Basics HoTT.Types Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback PathAny Colimits.Pushout