copy — Mathlib

English

The coerced copy mirrors the newly chosen function on inputs.

Русский

Сопряженная копия совпадает с новой функцией на входах.

LaTeX

$$$\\text{coe\_copy}(f,f',h): \\!\\!\\mapsto f'$$$

Lean4

/-- Copy of an `OrderMonoidHom` with a new `toFun` equal to the old one. Useful to fix
definitional equalities. -/
@[to_additive /-- Copy of an `OrderAddMonoidHom` with a new `toFun` equal to the old one. Useful to
    fix definitional equalities. -/
    ]
protected def copy (f : α →*o β) (f' : α → β) (h : f' = f) : α →*o β :=
  { f.toMonoidHom.copy f' h with toFun := f', monotone' := h.symm.subst f.monotone' }

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