English
Appending vectors corresponds under toList to appending lists: toList (v ++ w) = toList v ++ toList w.
Русский
Сложение векторов соответствует сложению списков под toList: toList (v ++ w) = toList v ++ toList w.
LaTeX
$$@[simp]\\ntheorem toList_append {n m : \\mathbb{N}} (v : Vector α n) (w : Vector α m) : toList (v ++ w) = toList v ++ toList w$$
Lean4
/-- Appending of vectors corresponds under `toList` to appending of lists. -/
@[simp]
theorem toList_append {n m : ℕ} (v : Vector α n) (w : Vector α m) : toList (v ++ w) = toList v ++ toList w :=
rfl