no goals
ι : Type ?u.11255
B : Type u_1
F : Type u_2
E : B → Type ?u.11266
Z : Type u_3
inst✝¹ : TopologicalSpace B
inst✝ : TopologicalSpace F
proj : Z → B
e✝ : Pretrivialization F proj
x : Z
e f : Pretrivialization F proj
⊢ (LocalEquiv.trans (LocalEquiv.symm f.toLocalEquiv) e.toLocalEquiv).source = (e.baseSet ∩ f.baseSet) ×ˢ univ
rw [LocalEquiv.trans_source, LocalEquiv.symm_source, e.target_inter_preimage_symm_source_eq]