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Crossover
Barrier crossover strategy
| Type: | int | |
|---|---|---|
| Default value: | -1 | |
| Minimum value: | -1 | |
| Maximum value: | 4 |
Determines the crossover strategy used to transform the interior
solution produced by barrier into a basic solution (note that
crossover is not available for QP or QCP models). Crossover consists
of three phases: (i) a primal push phase, where primal
variables are pushed to bounds, (ii) a dual push phase, where
dual variables are pushed to bounds, and (iii) a cleanup
phase, where simplex is used to remove any primal or dual
infeasibilities that remain after the push phases are complete. The
order of the first two phases and the algorithm used for the third
phase are both controlled by the Crossover parameter:
| Parameter value | First push | Second push | Cleanup |
|---|---|---|---|
| 0 | Disabled | Disabled | Disabled |
| 1 | Dual | Primal | Primal |
| 2 | Dual | Primal | Dual |
| 3 | Primal | Dual | Primal |
| 4 | Primal | Dual | Dual |
The default value of -1 chooses the strategy automatically. Use value 0 to disable crossover; this setting returns the interior solution computed by barrier.
Note: Barrier only
For examples of how to query or modify parameter values from our different APIs, refer to our Parameter Examples.
