∀ {A : Type u_1} [inst : CStarAlgebra A] [inst_1 : PartialOrder A] [inst_2 : StarOrderedRing A]
  (a a_1 : ↥(selfAdjoint A)) (e_a : a = a_1) (ha_norm : ‖a‖ ≤ 1),
  selfAdjoint.unitarySelfAddISMul a ha_norm = selfAdjoint.unitarySelfAddISMul a_1 ⋯