WSeq

Mathlib.Data.WSeq.Basic

URI: https://scilib.ai/kg/mathlib#Stream'.WSeq

Lean4

/-- Weak sequences.

  While the `Seq` structure allows for lists which may not be finite,
  a weak sequence also allows the computation of each element to
  involve an indeterminate amount of computation, including possibly
  an infinite loop. This is represented as a regular `Seq` interspersed
  with `none` elements to indicate that computation is ongoing.

  This model is appropriate for Haskell style lazy lists, and is closed
  under most interesting computation patterns on infinite lists,
  but conversely it is difficult to extract elements from it. -/
def WSeq (α) :=
  Seq (Option α)

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Вычислительный центр им. А. А. Дороницына при ФИЦ «Информатика и Управление» РАН frccsc.ru