Two continuous time formulations of the dynamic traffic assignment problem are considered, one that corresponds to system optimization and the other to a version of user optimization on a single mode ...

The dual of the energy-maximization problem can be interpreted as assigning a rate of exchange or unit fee, in terms of energy, to each toxin or other upward-limited food component and to each ...

SAS/OR software may be of interest to users of SAS/STAT software for its mathematical programming features. In particular, the NLP procedure in SAS/OR software solves nonlinear programming problems, ...