Linear Operators: Spectral Theory : Self Adjoint Operators in Hilbert Space, Volume 2 |
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Page 1931
Of course it is not clear to begin with that a countably additive resolution of the
identity defined on the Borel sets of the plane is uniquely determined by the
spectral operator T . This is the case , but until it is proved we refer to any such
spectral ...
Of course it is not clear to begin with that a countably additive resolution of the
identity defined on the Borel sets of the plane is uniquely determined by the
spectral operator T . This is the case , but until it is proved we refer to any such
spectral ...
Page 2053
In the examples of Theorems 19 and 21 we did not appeal to the general theory ,
as it was clear from the form of exp tà that T ( t ) o was differentiable for t > 0 and
an arbitrary y in HP . It is even clear that the nth order derivative T ' ( n ) ( t ) exists
...
In the examples of Theorems 19 and 21 we did not appeal to the general theory ,
as it was clear from the form of exp tà that T ( t ) o was differentiable for t > 0 and
an arbitrary y in HP . It is even clear that the nth order derivative T ' ( n ) ( t ) exists
...
Page 2159
Some results in this direction will be found in the next four lemmas . 11 LEMMA (
G ) . The union of all intervals of constancy relative to T is an open set dense in I .
. PROOF . It is clear that the union of intervals of constancy is open . To see that ...
Some results in this direction will be found in the next four lemmas . 11 LEMMA (
G ) . The union of all intervals of constancy relative to T is an open set dense in I .
. PROOF . It is clear that the union of intervals of constancy is open . To see that ...
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