On the connection between sets of operator synthesis and sets of spectral synthesis for locally compact groups

Details On the connection between sets of operator synthesis and sets of spectral synthesis for locally compact groups On the connection between sets of operator synthesis and sets of spectral synthesis for locally compact groups

2004-11-09

arxiv.org/abs/math/0411186v1

Mathematics

Functional Analysis

21 pages

Scientific paper

We extend the results by Froelich and Spronk and Turowska on the connection between operator synthesis and spectral synthesis for A(G) to second countable locally compact groups G. This gives us another proof that one-point subset of G is a set of spectral synthesis and that any closed subgroup is a set of local spectral synthesis. Furthermore we show that ``non-triangular'' sets are strong operator Ditkin sets and we establish a connection between operator Ditkin sets and Ditkin sets. These results are applied to prove that any closed subgroup of $G$ is a local Ditkin set.

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