English
The p-adic numbers ℚ_p are the Cauchy completion of ℚ with respect to the p-adic norm.
Русский
P-адовые числа ℚ_p являются complèteми по мере Cauchy для ℚ относительно p-адиковой нормы.
LaTeX
$$\mathbb{Q}_{(p)} = \mathrm{Cauchy}(\mathbb{Q}, \|\cdot\|_p)$$
Lean4
/-- The `p`-adic numbers `ℚ_[p]` are the Cauchy completion of `ℚ` with respect to the `p`-adic norm.
-/
def Padic (p : ℕ) [Fact p.Prime] :=
CauSeq.Completion.Cauchy (padicNorm p)