Hyperangular momentum, hyperspherical

The full three-body problem in the physical three-dimensional space required development of hyperspherical harmonic expansions [39]. Crucial for further progress was the introduction of discrete analogues for the latter [40-43], based on hyperangular momentum theory [44,45] and leading to the efficient hyperquantization algorithm [46 19]. For other hyperspherical approaches to reaction dynamics, see [50-63],... 

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