English
The diagonal map from the total space of the fiberwise product into the product of the two total spaces is inducing.
Русский
Диагональное отображение из общего пространства произведения волокон в произведение двух общих пространств индукционно.
LaTeX
$$$\mathrm{IsInducing}\left(\lambda p, (\langle p.1, p.2.1\rangle, \langle p.1, p.2.2\rangle)\right)$$$
Lean4
/-- The diagonal map from the total space of the fiberwise product of two fiber bundles
`E₁`, `E₂` into `TotalSpace F₁ E₁ × TotalSpace F₂ E₂` is an inducing map. -/
theorem isInducing_diag :
IsInducing
(fun p ↦ (⟨p.1, p.2.1⟩, ⟨p.1, p.2.2⟩) : TotalSpace (F₁ × F₂) (E₁ ×ᵇ E₂) → TotalSpace F₁ E₁ × TotalSpace F₂ E₂) :=
⟨rfl⟩