English
Definition: cauSeqRe(f) is the CauSeq of real parts extracted from a complex CauSeq.
Русский
Определение: cauSeqRe(f) — CauSeq вещественных чисел, получаемый из комплексной CauSeq.
LaTeX
$$$\\mathrm{cauSeqRe}(f) = \\langle\\_, isCauSeq\\; re\\; f\\rangle$$$
Lean4
/-- The real part of a complex Cauchy sequence, as a real Cauchy sequence. -/
noncomputable def cauSeqRe (f : CauSeq ℂ (‖·‖)) : CauSeq ℝ abs :=
⟨_, isCauSeq_re f⟩