I propose to implement the following suffices for variables and
constraints in MathProg:
.lb lower bound or -Infinity
.ub upper bound or +Infinity
.status status:
0 - undefined
1 - basic
2 - non-basic on lower bound
3 - non-basic on upper bound
4 - non-basic free
5 - non-basic fixed
.val primal value
.dual dual value (combined Lagrange multiplier, reduced cost)
Any comments and suggestions are appreciated.
Andrew Makhorin
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