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Graphical unitary group approach
Graphical unitary group approach (GUGA) is a technique
used to construct Configuration state functions (CSFs) in
computational quantum chemistry. As reflected in its name, the
method uses the mathematical properties of the unitary group.
The foundation of the unitary group approach (UGA) can be traced to the work of
Moshinsky. Later,
Shavitt
introduced the graphical aspect (GUGA) drawing on the earlier work of
Paldus.
Computer programs based on the GUGA method have been shown to be
highly efficient.
offering certain performance advantages over the older, sometimes
called traditional, techniques for CSF construction. However traditional methods can offer other
advantages such
as the ability to handle degenerate symmetry point groups, such as .
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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