English

Tensor products and the semi-Browder joint spectra

Functional Analysis 2016-05-24 v1

Abstract

Given two complex Banach spaces X1X_1 and X2X_2, a tensor product of X1X_1 and X2X_2, X1~X2X_1\tilde{\otimes}X_2, in the sense of J. Eschmeier ([5]), and two finite tuples of commuting operators, S=(S1,,Sn)S=(S_1,\ldots ,S_n) and T=(T1,,Tm)T=(T_1,\ldots ,T_m), defined on X1X_1 and X2X_2 respectively, we consider the (n+m)(n+m)-tuple of operators defined on X1~X2X_1\tilde{\otimes}X_2, (SI,IT)=(S1I,,SnI,IT1,,ITm)(S\otimes I,I\otimes T)= (S_1\otimes I,\ldots ,S_n\otimes I,I\otimes T_1,\ldots ,I \otimes T_m), and we give a description of the semi-Browder joint spectra introduced by V. Kordula, V. M\"uller and V. Rakocˇ\check{c}evicˊ\acute{ c} in [7] and of the split semi-Browder joint spectra (see section 3), of the (n+m)(n+m)-tuple (SI,IT)(S\otimes I ,I\otimes T), in terms of the corresponding joint spectra of SS and TT. This result is in some sense a generalization of a formula obtained for other various Browder spectra in Hilbert spaces and for tensor products of operators and for tuples of the form (SI,IT)(S\otimes I ,I\otimes T). In addition, we also describe all the mentioned joint spectra for a tuple of left and right multiplications defined on an operator ideal between Banach spaces in the sense of [5].

Keywords

Cite

@article{arxiv.1605.06620,
  title  = {Tensor products and the semi-Browder joint spectra},
  author = {Enrico Boasso},
  journal= {arXiv preprint arXiv:1605.06620},
  year   = {2016}
}

Comments

17 pages, original research article