作者: animated 時(shí)間: 2025-3-29 20:56
,Numerical Aspects of Weyl’s Theory,condition at the right endpoint x = b of the interval [a,b], Weyl /1/ found that m had to lie on a circle in the complex plane. For the singular case, b → ∞, Weyl’s circle shrinks either to a limit circle or to a limit point m.(λ). For most physical examples the differential operator is of limit poi
作者: 貪婪性 時(shí)間: 2025-3-30 00:22
作者: 薄荷醇 時(shí)間: 2025-3-30 07:26
作者: 紅腫 時(shí)間: 2025-3-30 11:04
Laguerre Polynomials, Reminiscences from Uppsala, odd jobs in the office like pasting Physics Abstract cuttings on sheets of white paper and helping the secretaries with the binding of Technical Reports. In the meantime I was busy reading L?wdin’s articles trying to learn and understand his approach to quantum chemistry. After a few months Profess
作者: 蜿蜒而流 時(shí)間: 2025-3-30 14:11
作者: 評(píng)論性 時(shí)間: 2025-3-30 18:25
The Non-Orthogonality Problem and Orthogonalization Procedures,nal one to another /5/. The problem was at the same time a physical and a mathematical one, as will be illustrated below. L?wdin’s work (/6/ and references given later) played a decisive role in formulating correctly and analyzing this problem.
作者: BOGUS 時(shí)間: 2025-3-30 22:16
Importance of Overlap in the Analysis of Weak Exchange Interactions by Perturbation Methods,ey often play an essential role in problems of molecular stability and conformation, of the cohesive energy of insulators and metals, magnetic ordering in solids with paramagnetic cations; etc. Their accurate evaluation is, consequently, a conditio sine qua non for any satisfactory theoretical analysis of properties of condensed matter.
作者: 毗鄰 時(shí)間: 2025-3-31 04:54
Test of the Conventional Quantum Chemistry Methods on the Hydrogen Atom,xponentials, exp(-kηr); k = 1, 2...N. N is the .rder of the basis set and η is the scale factor. Scaled functions φ. are obtained from the unscaled ones φ. in the usual way /1/: .Both sets become complete in the interval 0≤r≤∞ when N→∞ and, for both, all the necessary integrals are elementary.
作者: 發(fā)微光 時(shí)間: 2025-3-31 06:44
Book 1976tific and organizational - of an individual person. Scientific achievement cannot be subjected to the very refined measurement techniques of science itself, but there is a continuous mutual evaluation among scientists which manifests itself through refereeing, literature citation and dedicatory volu
作者: 館長 時(shí)間: 2025-3-31 09:21
,Acta V?l?dalensia Revisited: Per-Olov L?wdin in Scientific Discussion,n, Sweden, in 1958. It finished with a panel discussion which is a precursor of the many Symposia in Florida and Scandinavia. A rather complete version of the proceedings was circulated as Technical Note 16 (no longer available) from the Uppsala Quantum Chemistry Group. It had the unofficial name of Acta V?l?dalensia.
作者: chance 時(shí)間: 2025-3-31 16:43
作者: harbinger 時(shí)間: 2025-3-31 18:02
作者: sebaceous-gland 時(shí)間: 2025-3-31 21:56
,Numerical Aspects of Weyl’s Theory,ortional to the spectral density. In fact, as shown in detail by Chaudhuri and Everitt /3/, the spectrum of singular second order differential operators is completely characterized by the analytic properties of the m-function on the real axis.
作者: Exploit 時(shí)間: 2025-4-1 04:46
On Resonant Potential Scattering,ull /3/, they actually included the continuum spectrum in a configuration interaction calculation for the helium atom. This was achieved by means of a “discretization” of the continuum, with excellent results for the ground state of He.
作者: DEMN 時(shí)間: 2025-4-1 10:00
,Per-Olov L?wdin in the Scientific Literature 1965–1974,ld. In fields like chemistry and physics with established bibliographical procedures and age-old traditions of international dissemination of scientific results Science Citation Index offers an almost complete coverage.
作者: Fulsome 時(shí)間: 2025-4-1 10:12
作者: 拾落穗 時(shí)間: 2025-4-1 17:22
作者: Psa617 時(shí)間: 2025-4-1 22:05
978-1-4757-1661-0Springer Science+Business Media New York 1976
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