Mathematics – Spectral Theory
Scientific paper
2011-03-20
Mathematics
Spectral Theory
16 pages, second and final version. Key words: spectral analysis, essential spectrum, C*-algebras, elliptic differential opera
Scientific paper
We compare two C*-algebras that have been used to study the essential
spectrum. This is done by considering a simple second order elliptic
differential operator acting in L^2(R^N), which is affiliated with one or both
of the algebras depending on the behaviour of the coefficients.
Davies Brian E.
Georgescu Vladimir
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