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Line 1: In mathematics, specifically in [[spectral theory]], an [[eigenvalue]] of a [[Unbounded_operator#Closed_linear_operators\|closed linear operator]] is called '''normal''' if the space admits a decomposition into a direct sum of a finite-dimensional [[generalized eigenspace]] and an [[invariant subspace]] where <math>A-\lambda I</math> has a bounded inverse. ==Root lineal==

Normal eigenvalue: Difference between revisions