Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-08-25 03:05 fec8ffec

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chore(analysis/normed_space/star/*): migrate use of a ∈ self_adjoint A to is_self_adjoint a (#16212) After #15326, this PR migrates existing uses of a ∈ self_adjoint A to is_self_adjoint a so as to standardize. We also move several results into the is_self_adjoint namespace in order to take advantage of dot notation.

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