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On the structure of twisted group ๐ถ*-algebras

On the structure of twisted group ๐ถ*-algebras

We first give general structural results for the twisted group algebras <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper C Superscript asterisk Baseline left-parenthesis upper G comma sigma right-parenthesis"> <mml:semantics> <mml:mrow> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msup> <mml:mi>C</mml:mi> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>โˆ—<!-- โˆ— --></mml:mo> </mml:mrow> </mml:msup> </mml:mrow> <mml:mo stretchy="false">(</mml:mo> <mml:mi>G</mml:mi> <mml:mo>,</mml:mo> <mml:mi>ฯƒ<!-- ฯƒ --></mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> โ€ฆ