Xiaoman, Chen et Chaocheng, Huang, On the Representation of the Joint Spectrum for a Commuting n-tuple of Non-normal Operators, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 3(3), 1987, pp. 215-226
The main purpose of the present paper is to describe the Taylor joint spectra for n-tuples of double commuting hyponormal operators, and to study the representation of the joint spectra in terms of that of n-tuples of commuting normal operators.