Simple linear programming example from

Vanderbei, R.J. (2000).  
Linear programming, Foundations and extensions.
Kluwer Academic Publishers, Boston.

Example chapter 5

####################################################################

## DECISION VARIABLES

x1
x2
x3

## END DECISION VARIABLES

## INEQUALITIES
 
   x1 + 4*x2      < 1
 3*x1 -   x2 + x3 <3

## END INEQUALITIES

## PARAMETERS

p1 = 4
p2 = 1
p3 = 3

## END PARAMETERS

## MAXIMISATION

p1*x1 + p2*x2 + p3*x3

## END MAXIMISATION
