English
SlashInvariantForm is equipped with a FunLike structure: there is a canonical function coercion to functions ℍ → ℂ and equality is determined by underlying functions.
Русский
SlashInvariantForm снабжен структурой FunLike: есть каноническое отображение в функции ℍ → ℂ и равенство форм определяется по значениям функций.
LaTeX
$$$\text{SlashInvariantForm}.toFun = (\text{SlashInvariantForm} \,\text{as function})$$$
Lean4
instance (priority := 100) funLike : FunLike (SlashInvariantForm Γ k) ℍ ℂ
where
coe := SlashInvariantForm.toFun
coe_injective' f g h := by cases f; cases g; congr