electron-electron interaction strength and hopping interaction strength



 Hi,
 can somebody tell me what term a quantum chemist would use for
 "electron-electron interaction strength"? Is it the same as electron
 correlation?
 And what is "hopping interaction strength"? Does it refer to integrals
 h(ij)
 between orbitals i and j located on different atoms?
 Best regards
 Merethe
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 Merethe Sjovoll, Ph.D.                      *          *
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