English
Another formulation of HasBasis for the uniformity in the absolute-value setting: the same basis described with the absolute value on the difference.
Русский
Другая формулировка HasBasis для униформности в рамках абсолютной величины: та же базисная структура через абс. величину разности.
LaTeX
$$$\\mathcal U[abv.uniformSpace] .HasBasis (0 < ·) (ε \\mapsto \\{p,q\\in R\\times R : abv(q-p) < ε\\})$$$
Lean4
/-- If `α` is complete, then it is an abstract completion of itself. -/
def ofComplete [T0Space α] [CompleteSpace α] : AbstractCompletion α :=
mk α id inferInstance inferInstance inferInstance .id denseRange_id