Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-02-23 17:43 f04ad9a1

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feat(analysis/normed_space/star/spectrum): prove the spectral radius of a selfadjoint element in a C*-algebra is its norm. (#12211) This establishes that the spectral radius of a selfadjoint element in a C*-algebra is its (nn)norm using the Gelfand formula for the spectral radius. The same theorem for normal elements can be proven using this once normal elements are defined in mathlib.

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