Slack variable
From Encyclopedia of Mathematics
surplus variable
A non-negative variable 
that is introduced for a (linear) constraint 
in a mathematical programming or linear programming problem to convert this inequality into an equality 
. If this is done for all inequalities in a linear programming problem, one sometimes speaks of logical variables.
How to Cite This Entry:
Slack variable. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Slack_variable&oldid=17975
Slack variable. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Slack_variable&oldid=17975
This article was adapted from an original article by M. Hazewinkel (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article