English
From the equivalence IsPrecomplete I M, one can deduce the previous lemmas: e.g., existence of limits for Cauchy sequences.
Русский
Из эквивалентности IsPrecomplete I M следует существование предельных значений последовательностей Cauchy.
LaTeX
$$$IsPrecomplete I M \Rightarrow \text{(precomplete properties follow)}$$$
Lean4
protected theorem subsingleton (h : IsHausdorff (⊤ : Ideal R) M) : Subsingleton M :=
⟨fun x y =>
eq_of_sub_eq_zero <|
h.haus (x - y) fun n => by
rw [Ideal.top_pow, top_smul]
exact SModEq.top⟩