浪荡子 发表于 2025-3-26 22:52:38
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Christoph Thiele,Falk Fahrenholzs the independent-particle approximation works rather well and it is possible to choose the one-particle states in such a way, that among all many-particle symmetry-adapted states there is one state or a combination of a few states clearly dominating the exact solution. In such cases one may argue tOWL 发表于 2025-3-27 11:52:53
Hanspeter Saluz,Jean-Pierre Jostred according to their symmetry species and certain vertices at the lowest levels of a given symmetry removed. Following Fig . graphs showing ., ., ., . symmetry configurations for water are presented (these graphs were produced on a normal line printer and are a part of output of a computer programPLIC 发表于 2025-3-27 13:38:00
Peter Jackson,John T. Gallagherig . are equivalent the first is the most natural, because the contribution of each arc to the total . and . numbers is clearly visible and we may introduce a horizontal axis to measure ., . values. In the two other cases we have to label each arc with two weights, one for the number of electrons asBUOY 发表于 2025-3-27 18:52:33
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Prefaced seeing have much in common — we say “I see” meaning “I understand”, for example. Most of us prefer to have a picture of an abstract object. The remarkable popularity of the Feynman diagrams, and other diagrammatic approaches to many-body problem derived thereof, may be partially due to this preferlanguor 发表于 2025-3-28 02:56:29
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