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NAME line, a single line, the first in the file, defines the name of the problem. For example,
VARIABLE lines, a separate one for each variable, consist of four fields, like this:
Field | Purpose |
|---|---|
c | letter c indicates a column |
cname | name of the variable |
primal-value | value of the primal variable in that column |
reduced-cost | reduced cost of that variable |
CONSTRAINT lines, a separate one for each constraint, also consist of four fields, like this:
Field | Purpose |
|---|---|
r | letter r indicates a row |
rname | name of the constraint |
slack-value | value of the slack (artificial) variable on that row |
dual-value | dual variable on that row |
END line, consisting of the token ENDATA, completes a VEC file.
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