$k$-hyponormality of powers of weighted shifts via Schur products.

Autor:	Raúl Curto, Sang Soo Park
Předmět:	HYPONORMAL operators LINEAR operators OPERATOR theory SCHUR functions
Zdroj:	Proceedings of the American Mathematical Society; Sep2003, Vol. 131 Issue 9, p2761-2769, 9p
Abstrakt:	We characterize $k$-hyponormality and quadratic hyponormality of powers of weighted shifts using Schur product techniques. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu