English
Compatibility of glue maps with base inclusions: the glue left map composed with Φ equals the glue right map composed with Ψ.
Русский
Совместимость квадратов склейки: левая карта склейки после Φ равна правой карте склейки после Ψ.
LaTeX
$$$\mathrm{toGlueL}(h_\Phi,h_\Psi) \circ \Phi = \mathrm{toGlueR}(h_\Phi,h_\Psi) \circ \Psi$$$
Lean4
theorem toGlue_commute (hΦ : Isometry Φ) (hΨ : Isometry Ψ) : toGlueL hΦ hΨ ∘ Φ = toGlueR hΦ hΨ ∘ Ψ :=
by
let i : PseudoMetricSpace (X ⊕ Y) := gluePremetric hΦ hΨ
let _ := i.toUniformSpace.toTopologicalSpace
funext
simp only [comp, toGlueL, toGlueR]
refine SeparationQuotient.mk_eq_mk.2 (Metric.inseparable_iff.2 ?_)
exact glueDist_glued_points Φ Ψ 0 _