## Linear Operators: Spectral Theory : Self Adjoint Operators in Hilbert Space, Volume 2 |

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Page 1951

Let 0 € ō and let To = TE ( 0 ) | E ( o ) X , the restriction of T to the invariant

subspace E ( 0 ) X . Since o ( T . ) sē , it follows that 0 € p ( T . ) and hence Tă

exists as a bounded

Let 0 € ō and let To = TE ( 0 ) | E ( o ) X , the restriction of T to the invariant

subspace E ( 0 ) X . Since o ( T . ) sē , it follows that 0 € p ( T . ) and hence Tă

exists as a bounded

**linear**operator in the space E ( X ) . Let V , be the bounded**linear**...Page 2400

The basic idea of Friedrichs ' method may be expressed heuristically as follows .

Let X be a B - space , and let T be a

operator in X which is , in a sense to be made precise below , very small relative

...

The basic idea of Friedrichs ' method may be expressed heuristically as follows .

Let X be a B - space , and let T be a

**linear**operator in X ; let K be a second**linear**operator in X which is , in a sense to be made precise below , very small relative

...

Page 2533

Closed

Math . 12 , 183 – 186 ( 1962 ) . 2 . Unbounded

applications . McGraw - Hill , New York , 1966 . Goldberg , S . , and Schubert , C .

1 .

Closed

**linear**operators and associated continuous**linear**operators . Pacific J .Math . 12 , 183 – 186 ( 1962 ) . 2 . Unbounded

**linear**operators : Theory andapplications . McGraw - Hill , New York , 1966 . Goldberg , S . , and Schubert , C .

1 .

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