Finset.piecewise

{ι : Type u_1} →
  {π : ι → Sort u_2} →
    (s : Finset ι) → ((i : ι) → π i) → ((i : ι) → π i) → [(j : ι) → Decidable (j ∈ s)] → (i : ι) → π i

s.piecewise f g is the function equal to f on the finset s, and to g on its complement.

Defined in: Mathlib.Data.Finset.Piecewise
Cited by: 64 results in Mathlib
Foundations: Depth 54 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Decidable

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