## Proceedings of the International School of Physics "Enrico Fermi.", Volume 72N. Zanichelli, 1979 - Nuclear physics |

### From inside the book

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Page 73

PART I The statistical problem of

formulation of the projection postulate . von Neumann ' s argument for the

projection postulate is introduced in § 3 of Chapter III of his book , Mathematical

Foundations of ...

PART I The statistical problem of

**measurement**. 1 . – von Neumann ' sformulation of the projection postulate . von Neumann ' s argument for the

projection postulate is introduced in § 3 of Chapter III of his book , Mathematical

Foundations of ...

Page 74

This suggests that , after a

relative probabilities of properties of the system are generated by the projection

operator P . ( ) . The operator P ( 8 ) cannot , of course , be normalized by the

factor 1 / Tr ...

This suggests that , after a

**measurement**of C gielding the result CES , therelative probabilities of properties of the system are generated by the projection

operator P . ( ) . The operator P ( 8 ) cannot , of course , be normalized by the

factor 1 / Tr ...

Page 78

What is important is that the projection postulate in the form PWP W →W ' = Tr (

PWP ) ' where P is the projection operator corresponding to the subspace

determined by the

to all ...

What is important is that the projection postulate in the form PWP W →W ' = Tr (

PWP ) ' where P is the projection operator corresponding to the subspace

determined by the

**measurement**result , can be taken as a general rule , applyingto all ...

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### Contents

Gradual infiltration of probabilitys laws into physical sciences | 1 |

Statistical fluctuations | 10 |

Introduction | 21 |

Copyright | |

24 other sections not shown

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according additive appear applied approach argument assume atoms Borel called classical closed complete concept consider constant corresponding countable course defined definition derived described determined dialog discussion distribution dynamics edited effect elementary elements energy equal equation equivalent example exists experiment expressed fact field final finite formal frequency function geometry give given Hence implies initial interpretation lattice limit logical mass material mathematical means measurement motion natural observable obtain operator particle particular Phys physical positive possible precision present principle probability problem proof propositions proved quantity quantum mechanics question reason refer relation relative represented requirement respect result rules satisfies sense sequence space space-time special relativity statistical structure theorem theory transformation turn unit Universe vector