20.4.9 Selecting the primary configuration set

PSPACE,select,npspac;

select:

energy criterion for selecting p-space configurations. If negative, a test for p-space H is performed.

npspac:

minimum number of p-space configurations. Further configurations are added if either required by select or if configurations are found which are degenerate to the last p-space configuration. A minimum number of npspace is automatically determined from the state specifications.