fact: Definition extension_from_inO_sigma {O' : Subuniverse} (O : Subuniverse) {A:Type} `{Reflects O' A} (B: O_reflector O' A -> Type) {inO_sigma : In O' {z:O_reflector O' A & B z}} (g : forall x, B (to O' A x)) : ExtensionAlong (to O' A) B g.
imports: HoTT.Basics HoTT.Types HFiber Extensions Factorization Limits.Pullback ReflectiveSubuniverse