Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-07-29 02:07 6b647c3b

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refactor(linear_algebra, analysis/inner_product_space): use ⊤ ≤ instead of = ⊤ in bases constructors (#15697) All the existing proof just need a .ge to be fixed, and this allows to remove a lot of rw [eq_top_iff], and it sticks with the convention of having weakest forms in assumptions and stronger forms in conclusion. Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60.E2.8A.A4.20.E2.89.A4.20span.60.20in.20basis.20constructors

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