A spectral mapping theorem for the Weyl spectrum

A note on spectral mapping theorem

This paper aims to present the well-known spectral mapping theorem for multi-variable functions.

The Spectral Mapping Theorem for Joint Approximate Point Spectrum

The spectral mapping theorem for joint approximate point spectrum is proved when A is an «-tuple of commuting operators on a Banach space and ƒ is any w-tuple of rational functions for which f (A) is defined. The purpose of the paper is to show how properties of parts of the joint spectrum can be obtained by use of spaces of sequences of vectors. The method (first used for general Banach spaces...

A Spectral Mapping Theorem for Representations of One-parameter Groups

In this paper we present some generalization (at the same time a new and a short proof in the Banach algebra context) of the Weak Spectral Mapping Theorem (WSMT) for non-quasianalytic representations of oneparameter groups.

A Local Peter-weyl Theorem

An Ad K invariant inner product on the Lie algebra of a compact connected Lie group K extends to a Hermitian inner product on the Lie algebra of the complexified Lie group Kc. The Laplace-Beltrami operator, ∆, on Kc induced by the Hermitian inner product determines, for each number a > 0, a Green’s function ra by means of the identity (a2−∆/4)−1 = ra∗. The Hilbert space of holomorphic functions...

A Necessary Condition for Weyl-Heisenberg Frames