feat: prepare for removing @[simp] from Sum.forall and Sum.exists #18491
+24
−17
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I would like to remove
@[simp]
fromSum.forall
andSum.exists
, per leanprover/lean4#5900.The right hand sides of these lemmas are more complicated, and moreover they cause many problems with simp lemma confluence. (Confluence tool coming soon!)
This PR pre-emptively prepares Mathlib for this change. If we can't get it review in time I can just make these lemmas into simp lemmas globally in Mathlib.