Disintegration theory for von Neumann algebras
Disintegration theory for von Neumann algebras
Disintegration theory for von Neumann algebras
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Contents<br />
Abstract<br />
Introduction<br />
ii<br />
iii<br />
1 The commutant of an abelian <strong>von</strong> <strong>Neumann</strong> algebra 1<br />
1.1 Maximal abelian <strong>algebras</strong> acting on separable spaces . . . . . . . . . . . . . . . . . 1<br />
1.2 The commutant of an abelian <strong>von</strong> <strong>Neumann</strong> algebra . . . . . . . . . . . . . . . . . . 5<br />
2 <strong>Disintegration</strong> <strong>theory</strong> 7<br />
2.1 <strong>Disintegration</strong> of Hilbert spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />
2.2 Decomposable operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12<br />
2.3 Decomposable representations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18<br />
2.4 Decomposable <strong>von</strong> <strong>Neumann</strong> <strong>algebras</strong> . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
2.5 Decompositions and the commutant . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br />
3 The central decomposition 29<br />
3.1 Decomposition relative to an abelian algebra . . . . . . . . . . . . . . . . . . . . . . 29<br />
3.2 Type of the components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31<br />
A Measure theoretic results 33<br />
A.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33<br />
A.2 Measure theoretic technicalities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34<br />
A.3 Polish spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />
A.4 Analytic sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38<br />
A.5 Measurable selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41<br />
Bibliography 43<br />
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