baseChange_dblX — Mathlib

English

(W'.baseChange B).toProjective.dblY (f ∘ P) = f ((W'.baseChange A).toProjective.dblY P)

Русский

Базовое изменение сохраняет dblY: (W'.baseChange B).toProjective.dblY (f ∘ P) = f ((W'.baseChange A).toProjective.dblY P).

LaTeX

$$(W'.baseChange B).toProjective.dblY (f ∘ P) = f ((W'.baseChange A).toProjective.dblY P)$$

Lean4

theorem baseChange_dblX : (W'.baseChange B).toProjective.dblX (f ∘ P) = f ((W'.baseChange A).toProjective.dblX P) := by
  rw [← RingHom.coe_coe, ← map_dblX, map_baseChange]

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