The failure of rational dilation on a triply connected domain

Details The failure of rational dilation on a triply connected domain The failure of rational dilation on a triply connected domain

2003-10-24

arxiv.org/abs/math/0310398v1

Mathematics

Functional Analysis

43 pages

Scientific paper

For R a bounded triply connected domain with boundary consisting of disjoint Jordan loops there exists an operator T on a complex Hilbert space H so that the closure of R is a spectral set for T, but T does not dilate to a normal operator with spectrum in B, the boundary of R. There is considerable overlap with the construction of an example on such a domain recently obtained by Agler, Harland and Rafael using numerical computations and work of Agler and Harland.

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