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Theorems · Theorem · functional analysis

spectrum.coe_le_norm_of_mem

∀ {A : Type u_3} [inst : NormedRing A] [inst_1 : NormedAlgebra ℝ A] [CompleteSpace A] [NormOneClass A] {a : A}
  {r : NNReal}, r ∈ spectrum NNReal a → ↑r ≤ ‖a‖
Defined in
Mathlib.Analysis.Normed.Algebra.Spectrum
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Foundations
Depth 175 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NormedRingNormedAlgebraCompleteSpaceNormOneClass

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