Theorems · Definition · general algebraic systems

Finsupp.erase

{α : Type u_1} → {M : Type u_5} → [inst : Zero M] → α → (α →₀ M) → α →₀ M

erase a f is the finitely supported function equal to f except at a where it is equal to 0. If a is not in the support of f then erase a f = f.

Defined in

Mathlib.Data.Finsupp.Single

Cited by

46 results in Mathlib

Foundations

Depth 62 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

Zero