PreSOS1BigM
PreSOS1BigM
Threshold for SOS1-to-binary reformulation| Type: | double | |
|---|---|---|
| Default value: | -1 | |
| Minimum value: | -1 | |
| Maximum value: | 1e10 |
Controls the automatic reformulation of SOS1 constraints into binary form. SOS1 constraints are often handled more efficiently using a binary representation. The reformulation often requiresbig-Mvalues to be introduced as coefficients. This parameter specifies the largestbig-Mthat can be introduced by presolve when performing this reformulation. Larger values increase the chances that an SOS1 constraint will be reformulated, but very large values (e.g., 1e8) can lead to numerical issues.
The default value of -1 chooses a threshold automatically. You should set the parameter to 0 to shut off SOS1 reformulation entirely, or a large value to force reformulation.
For examples of how to query or modify parameter values from our different APIs, refer to ourParameter Examples.
Please refer tothis sectionfor more information on SOS constraints.