The spectra of unbounded hyponormal operators
The spectra of unbounded hyponormal operators
A bounded operator <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper T"> <mml:semantics> <mml:mi>T</mml:mi> <mml:annotation encoding="application/x-tex">T</mml:annotation> </mml:semantics> </mml:math> </inline-formula> on a Hilbert space is said to be completely hyponormal if <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper T Superscript asterisk Baseline upper T minus upper T upper T Superscript asterisk Baseline greater-than-over-equals 0"> <mml:semantics> <mml:mrow> …