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A variational description of the spectra of totally positive matrices, and extremal problems of approximation theory

✍ Scribed by A. P. Buslaev


Publisher
SP MAIK Nauka/Interperiodica
Year
1990
Tongue
English
Weight
379 KB
Volume
47
Category
Article
ISSN
0001-4346

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A variational principle for transition a
✍ Yuri Dmitriev; BjΓΆrn Roos πŸ“‚ Article πŸ“… 1975 πŸ› John Wiley and Sons 🌐 English βš– 400 KB

## Abstract A general variational principle for transition and density matrices is proposed. The principle is closely related to Rowe's variational treatment of the equations‐of‐motion method. It permits the simultaneous construction of coupled approximations for two eigenstates, and it is a straig