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Shorted operators and the structure of operators with numerical radius one |
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| Authors: | John W Bunce |
| Institution: | (1) Department of Mathematics, The University of Kansas, 66045 Lawrence, Kansas |
| Abstract: | The theory of the shorted operator is used to prove that if w(T) 1, then T can be written in the form T=2(I-C*C)1/2C. Using this form, Ando has exhibited a matricial form for a unitary 2-dilation of T. |
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