Finsupp.support_update_zero

∀ {α : Type u_1} {M : Type u_5} [inst : Zero M] (f : α →₀ M) (a : α) [inst_1 : DecidableEq α],
  (f.update a 0).support = f.support.erase a

Defined in: Mathlib.Data.Finsupp.Single
Cited by: 3 results in Mathlib
Foundations: Depth 65 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Zero DecidableEq

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