IsSelfAdjoint.norm_add_eq_max

∀ {A : Type u_1} [inst : NonUnitalCStarAlgebra A] {a b : A},
  IsSelfAdjoint a → IsSelfAdjoint b → a * b = 0 → ‖a + b‖ = max ‖a‖ ‖b‖

Defined in: Mathlib.Analysis.CStarAlgebra.GelfandDuality
Cited by: 2 results in Mathlib
Foundations: Depth 308 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: NonUnitalCStarAlgebra

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