Set.indicator

{α : Type u_1} → {M : Type u_3} → [Zero M] → Set α → (α → M) → α → M

Set.indicator s f a is f a if a ∈ s, 0 otherwise.

Defined in: Mathlib.Algebra.Notation.Indicator
Cited by: 723 results in Mathlib
Foundations: Depth 13 from the axioms, rests on 62 definitions · uses propext, Classical.choice, Quot.sound
Assumes: Zero

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