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sum rule

   Also found in: Acronyms, Wikipedia 0.01 sec.
sum rule [′səm ‚rül]
(quantum mechanics)
A formula for a transition between energy levels in which the sum of the transition strengths is expressed in a simple form.


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[infinity]] d[omega] Im[epsilon]([omega])[omega] (4) is known variously as the f-sum rule, the oscillator-strength sum rule, and the Thomas-Reiche-Kuhn sum rule.
Under the lump sum rules, the portion of the distribution attributable to service before 1974 can be treated as capital gain and taxed at a 20% rate.
 
 
 
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