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This implements a prototype
finiteness
tactic, designed to solve goals of the form*** < ∞
and(equivalently)
*** ≠ ∞
inENNReal
. There will be a lot of rough edges, it's not tested much.See previous Zulip discussions, e.g.
https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/infinity.20in.20positivity.3F
https://leanprover.zulipchat.com/#narrow/stream/412902-Polynomial-Freiman-Ruzsa-conjecture/topic/comments.20on.20FiniteMeasure.20user-friendliness/near/402458215