Taiwanese Journal of Mathematics, ( ISI ), Volume (15), No (5), Year (2011-10) , Pages (1939-1955)

Title : ( SHIFT PRESERVING OPERATORS ON LOCALLY COMPACT ABELIAN GROUPS )

Authors: Rajab Ali Kamyabi Gol , Reihaneh Raisi Tousi ,

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Abstract

We investigate shift preserving operators on locally compact abelian groups. We show that there is a one-to-one correspondence between shift preserving operators and range operators on L2(G) where G is a locally compact abelian group. We conclude that a shift preserving operator has several properties in common with its associated range operator, especially compactness of one implies compactness of the other. Moreover, we obtain a necessary condition for a shift preserving operator to be Hilbert Schmidt or of finite trace in terms of its range function.

Keywords

, Shift invariant space, Range function, Shift preserving operator, Range operator, Locally compact abelian group, Compact operator, Hilbert Schmidt operator, Trace.