๐”– Bobbio Scriptorium
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Another instructive example in eigenvalue perturbation theory

โœ Scribed by M.P. Fry


Book ID
113342044
Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
126 KB
Volume
86
Category
Article
ISSN
0370-2693

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๐Ÿ“œ SIMILAR VOLUMES


Two Examples in Perturbation Theory
โœ Cohn, J. H. E. ๐Ÿ“‚ Article ๐Ÿ“… 1963 ๐Ÿ› Oxford University Press ๐ŸŒ English โš– 133 KB
Examples of embedded eigenvalues for the
โœ K. J. Witsch ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 153 KB

## Abstract It is shown that there exist domains ฮฉ โŠ‚ โ„^__N__^, which outside of some ball coincide with the strip โ„^__N__ โˆ’ 1^ ร— (0, ฯ€) and for which the Dirichlet Laplacian โ€“ ฮ” has eigenvalues within the subinterval (1, 4) of the essential spectrum (1, โˆž).

An example of the mandelstam representat
โœ Paul Federbush ๐Ÿ“‚ Article ๐Ÿ“… 1965 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 113 KB

A Feynman diagram that has three particle intermediate states in all channels is studied. Choosing special values of the masses, in particular taking infrared divergent terms as certain masses go to zero, we explicitly calculate the spectral functions in this limit. They are nonzero in all three reg