Spectral theory for subnormal operators
Spectral theory for subnormal operators
We give an example of a subnormal operator <italic>T</italic> such that <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper C minus sigma left-parenthesis upper T right-parenthesis"> <mml:semantics> <mml:mrow> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mtext>C</mml:mtext> </mml:mrow> <mml:mspace width="thinmathspace" /> <mml:mi class="MJX-variant" mathvariant="normal">∖<!-- ∖ --></mml:mi> <mml:mspace width="thinmathspace" /> <mml:mi>σ<!-- σ --></mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mi>T</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:annotation …