Commutants and bicommutants of algebras of unbounded operators.

Autor: Inoue, Atsushi, Ueda, Hideyuki, Yamauchi, Toshiyuki
Předmět:
Zdroj: Journal of Mathematical Physics; Jan1987, Vol. 28 Issue 1, p1, 7p
Abstrakt: The first purpose of this paper is to show that for each Op*-algebra (M,D) whose weak commutant M’w is an algebra, there exists a closed Op*-algebra (M,D), which is the smallest extension of (M,D) satisfying Mw =M’w and Mw D =D. The second purpose is to characterize an unbounded bicommutant M‘wσ of an Op*-algebra M. The third purpose is to generalize the well-known Radon–Nikodym theorem for von Neumann algebras to Op*-algebras M satisfying the von Neumann density type theorem M t*s =M‘wσ. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index