Gantmacher-Krein Theorem for 2-totally Nonnegative Operators in Ideal Spaces.

Autor: Kushel, Olga Y., Zabreiko, Petr P.
Zdroj: Topics in Operator Theory; 2010, p395-410, 16p
Abstrakt: The tensor and exterior squares of a completely continuous nonnegative linear operator A acting in the ideal space X(Ώ) are studied. The theorem representing the point spectrum (except, probably, zero) of the tensor square (A ⊗ A)M in the terms of the spectrum of the initial operator A is proved. The existence of the second (according to the module) positive eigenvalue λ2, or a pair of complex conjugate eigenvalues of a completely continuous non-negative operator A is proved under the additional condition, that its exterior square (A 〉 A)M is also nonnegative. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index