Flag indicating that linear scaling is only done if it seems required.
This option is only important if a linear scaling
method (e.g., mc19) is used. If you choose "no",
then the scaling factors are computed for every
linear system from the start. This can be quite
expensive. Choosing "yes" means that the
algorithm will start the scaling method only when
the solutions to the linear system seem not good,
and then use it until the end.
The default value for this string option is "yes".
- no: Always scale the linear system.
- yes: Start using linear system scaling if solutions
seem not good.