Zulip Chat Archive
Stream: Is there code for X?
Topic: exists simplifying ors
Yakov Pechersky (Apr 08 2021 at 07:23):
Do we have these?
@[simp] lemma exists_or_eq_left {α : Sort*} (y : α) (p : α → Prop) : ∃ (x : α), x = y ∨ p x :=
⟨y, or.inl rfl⟩
@[simp] lemma exists_or_eq_right {α : Sort*} (y : α) (p : α → Prop) : ∃ (x : α), p x ∨ x = y :=
⟨y, or.inr rfl⟩
Eric Wieser (Apr 08 2021 at 07:31):
I assume we have docs#exist_eq?
Eric Wieser (Apr 08 2021 at 07:31):
But I guess not under that name...
Last updated: Dec 20 2023 at 11:08 UTC