term_⟦_|_⟧ — Mathlib

English

The sum of a singleton family equals the element itself under PMF constraints.

Русский

Сумма одноэлементной семьи равна соответствующему элементу при учёте PMF.

LaTeX

$$$\sum_{i\in\{i\}} X_i = X_i$$$

Lean4

/-- `P⟦s|m⟧` is the conditional expectation of `s` with respect to `m` under measure `P`. -/
@[scoped term_parser 1000]
public meta def «term_⟦_|_⟧» : Lean.TrailingParserDescr✝ :=
  ParserDescr.trailingNode✝ `ProbabilityTheory.«term_⟦_|_⟧» 1022 0
    (ParserDescr.binary✝ `andthen
      (ParserDescr.binary✝ `andthen
        (ParserDescr.binary✝ `andthen
          (ParserDescr.binary✝ `andthen (ParserDescr.symbol✝ "⟦") (ParserDescr.cat✝ `term 0)) (ParserDescr.symbol✝ "|"))
        (ParserDescr.cat✝ `term 0))
      (ParserDescr.symbol✝ "⟧"))

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