[Authors]
 O. I. Reinov

[Title]
 Some remarks on spectra of nuclear operators

[AMS Subj-class]
 47B10 Operators belonging to operator ideals (nuclear, $p$-summing,
       in the Schatten-von Neumann classes, etc.)

[Abstract]
 We give criteria for the spectra of some nuclear operators 
 in subspaces of quotients of L_p-spaces to be central-symmetric,
 as well as for the spectra of linear operators in Banach spaces
 to be Z_d-symmetric in the sense of B. Mityagin. Also,
 we present a short proof of a generalization of Mityagin's theorem.

[Comments]
 LaTeX, English, 9 pp.

[Contact e-mail]
 orein51@mail.ru