 The problems in this directory were collected from the LINDO textbook,
 "Optimization Modeling with LINDO", 5th edition.  Contact LINDO Systems
 for information on obtaining a copy of the LINDO text.


 Solving Textbook Problems on Your Own Computer
 ----------------------------------------------

   When you solve textbook problems on your own computer, the
 answers may be slightly different than those found in the 
 text book.  The differences will be of two kinds:

     a) approximately same value except different in the
        5th, or even less significant, decimal place,

     b) subtantially different value for a variable, slack,
        reduced cost, or dual price.

 Differences of type (a) tend to result from differences in
 numerical accuracy between the computer used for textbook
 illustrations and that of the user.  LINDO runs on a wide 
 variety of computers, not all having the same numerical
 precision.

 Differences of type (b) can occur when the problem has alternate
 optimal solutions.  All alternate optima have the same objective
 function value.  Different types of computers, because of
 differing numerical precision, may take slightly different paths
 to finding an optimal solution, so different computers may find
 different alternate optima.

 So a general rule is: if your objective function value agrees to
 five significant figures with that in the textbook, then
 everything is OK.