sum rule

(redirected from Addition rule)

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.
References in periodicals archive ?
Also, what addition rule should be used for superluminal speeds?
The addition rule of probability states that the probability of either of two mutually exclusive events is the sum of the probabilities of each individual event.
Finally, the students compare their empirically determined probability of rolling a 4 or a 6 with the probability obtained with the addition rule.
At this point, the teacher can introduce the addition rule of probability.
The Tax Courts decision in Home Group challenges the validity of the minimum addition rule under Regs.
Also, Letter Rulings (TAMs) 8009003 and 8031062 held that a $1 addition to the reserve was permissible in years prior to the effective date of the minimum addition rules, even though a much larger deduction was allowable.
The council can approve or disapprove an ordinance, but it cannot make amendments, so Henry asked the Airport Commission on Thursday to approve the curfew expansion as a new, separate ordinance, because it is supported by both sides and can be adopted by the council while more work is done on the ``no addition rule.
Henry said an ad hoc committee of airport tenants and homeowners has agreed to meet and try to work out a compromise on the ``no addition rule.
Olcott also noted that the plaintiffs intend to file a motion for a preliminary injunction in order to prevent Los Angeles from enforcing the non- addition rule during the pendency of the litigation.
The lawsuit seeks a declaratory order that the non- addition rule is unconstitutional and unlawful and seeks a permanent injunction preventing the City of Los Angeles from enforcing the rule.
Wherever possible, give reasons--maybe using a model, as in the case of the even-odd addition rules.
An annual review of the constituents was conducted in line with the deletion and addition rules of each index, with consideration for the delisting of some constituents due to the formation of holding companies, the publisher of the Nihon Keizai Shimbun financial daily and various other publications.