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

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Page 74

which represents a mixture, not a pure state. In the ease of a magnitude C

represented by an operator with a continuous spectrum, von Neumann

concludes that, after a

the state vector ...

which represents a mixture, not a pure state. In the ease of a magnitude C

represented by an operator with a continuous spectrum, von Neumann

concludes that, after a

**measurement**which localizes the value c of C to the set S,the state vector ...

Page 98

According to quantum mechanics, the joint probability pv(a1 & c[) is equal to the

sequential probability — c[), the probability that a

direction on 8' followed by a

According to quantum mechanics, the joint probability pv(a1 & c[) is equal to the

sequential probability — c[), the probability that a

**measurement**of spin in the a-direction on 8' followed by a

**measurement**of spin in the c-direction on ,S" yields ...Page 160

For instance, a meter stick can obviously

the well-known complications that arise in this connection, in quantum mechanics

. Every

For instance, a meter stick can obviously

**measure**itself. Later on we will discussthe well-known complications that arise in this connection, in quantum mechanics

. Every

**measurement**requires a certain time, and time is also one of the ...### What people are saying - Write a review

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### Contents

E Amaldi Radioactivity a pragmatic pillar of probabilistic | 1 |

Statistical fluctuations | 10 |

Final remarks | 21 |

Copyright | |

24 other sections not shown

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### Common terms and phrases

3-geometry algebra applied assertion atoms axioms Boolean Borel field Borel sets calculus concept conditional probability conditionalization consider corresponding countable course defined definition denote derived deterministic dialog dialog-game disjoint dynamics edited Einstein elements equation equivalent exists experiment finite formal function geometry given Gleason's theorem Hence Hilbert space implies induction initial interaction interpretation irreversible Journ linear magnitude Math mathematical means Neumann non-Boolean notion observable orthogonal orthomodular lattice particle photon Phys physical quantity physical system physical theories physicists positive precision probabilistic probability measure probability space probability theory problem procedure quantum logic quantum mechanics quantum theory quantum-logical question radioactive random variable real numbers relation relative frequency relf represented respect result rule sequence space-time special relativity spin statistical operator subset subspace superspace theorem tion transformation truth universal constants vector velocity von Neumann algebra zero