Elementary operators with H∞-symbols
- Cite this article as:
- Curto, R.E. & Fialkow, L.A. Integr equ oper theory (1987) 10: 707. doi:10.1007/BF01195797
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Let T be a c.n.u. contraction on a Hilbert spaceH and let u-(u1,...,un) be an n-tuple of H∞(T). We calculate various joint spectra of u(T) and apply the results to study the spectral and index theories of elementary operators associated with n-tuples of the above type.