## Linear Operators: Spectral theory |

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Page 925

16 Let N1, N2, ... be a countable

commuting with each other. Show that there exists a single Hermitian operator T

such that each No is a Borel function of T. (Hint: Use Theorem 2.1 and Exercise

15).

16 Let N1, N2, ... be a countable

**sequence**of normal operators in $5, allcommuting with each other. Show that there exists a single Hermitian operator T

such that each No is a Borel function of T. (Hint: Use Theorem 2.1 and Exercise

15).

Page 959

Since Uee, = e, the

whose union is eba. Since uo is countably additive on 30, uo(eba) = limm uo(een

ba) > k, and so for some m, u0(een) > u0(ee, ba) > k—e. This shows that the set ...

Since Uee, = e, the

**sequence**{eemba, m > 1} is an increasing**sequence**of setswhose union is eba. Since uo is countably additive on 30, uo(eba) = limm uo(een

ba) > k, and so for some m, u0(een) > u0(ee, ba) > k—e. This shows that the set ...

Page 1124

If En, E are in 3% and p(Ea) increases to the limit p(E), then it follows from what

we have already proved that E, is an increasing

E. If Exe is the strong limit of En, then E. s. E and p(Ex) = p(E). Thus, it follows as ...

If En, E are in 3% and p(Ea) increases to the limit p(E), then it follows from what

we have already proved that E, is an increasing

**sequence**of projections and E, sE. If Exe is the strong limit of En, then E. s. E and p(Ex) = p(E). Thus, it follows as ...

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### Contents

SPECTRAL THEORY | 858 |

868 | 885 |

Miscellaneous Applications | 937 |

Copyright | |

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