English
tprod is defined via a generic equality that matches its definitional projection; it selects the product value according to a chosen representation.
Русский
tprod определяется через общепринятое определение, согласующее его с выбранным представлением произведения.
LaTeX
$$$ \text{tprod} = \text{definition via wrapped projection and equality constraint} $$$
Lean4
theorem tprod_def : eta_helper Eq✝ @tprod.{} @(delta% @definition✝) :=
by
intros
delta tprod
rw [show wrapped✝ = ⟨@definition✝.{}, rfl✝⟩ from Subtype.ext✝ wrapped✝.2.symm✝]
rfl