GAMS — The Solver Manuals - Available Software

184 CPLEX 11
.divflt (real)
A diversity filter for a solution pool (see option solnpool) allows you generate solutions that are similar to
(or different from) a set of reference values that you specify for a set of binary variables. In particular, you
can use a diversity filter to generate more solutions that are similar to an existing solution or to an existing
partial solution.
A diversity filter drives the search for multiple solutions toward new solutions that satisfy a measure of
diversity specified in the filter. This diversity measure applies only to binary variables. Potential new
solutions are compared to a reference set. This reference set is specified with this dot option. If no reference
set is specified, the difference measure will be computed relative to the other solutions in the pool. The
diversity measure is computed by summing the pair-wise absolute differences from solution and the reference
values.
(default = 0)
dpriind (integer)
Pricing strategy for dual simplex method. Consider using dual steepest-edge pricing. Dual steepest-edge is
particularly efficient and does not carry as much computational burden as the primal steepest-edge pricing.
(default = 0)
0 Determined automatically
1 Standard dual pricing
2 Steepest-edge pricing
3 Steepest-edge pricing in slack space
4 Steepest-edge pricing, unit initial norms
5 Devex pricing
eachcutlim (integer)
This parameter allows you to set a uniform limit on the number of cuts of each type that Cplex generates.
By default, the limit is a large integer; that is, there is no effective limit by default.
Tighter limits on the number of cuts of each type may benefit certain models. For example, a limit on each
type of cut will prevent any one type of cut from being created in such large number that the limit on the
total number of all types of cuts is reached before other types of cuts have an opportunity to be created. A
setting of 0 means no cuts.
This parameter does not influence the number of Gomory cuts. For means to control the number of Gomory
cuts, see also the fractional cut parameters: fraccand, fraccuts, and fracpass.
(default = 2100000000)
epagap (real)
Absolute tolerance on the gap between the best integer objective and the objective of the best node remaining.
When the value falls below the value of the epagap setting, the optimization is stopped. This option
overrides GAMS OptCA which provides its initial value.
(default = GAMS OptCA)
epgap (real)
Relative tolerance on the gap between the best integer objective and the objective of the best node remaining.
When the value falls below the value of the epgap setting, the mixed integer optimization is stopped. Note
the difference in the Cplex definition of the relative tolerance with the GAMS definition. This option
overrides GAMS OptCR which provides its initial value.
Range: [0,1]
(default = GAMS OptCR)