9.1 Introduction to Integer Programming
x\, x2 ^ 0, .X| integer is a mixed integer programming problem (x2 is not required to be an integer). An integer programming problem in which all the variables must equal 0 or I is called a 0-1 IP. In Section 9.2, we see that 0-1 IPs occur in surprisingly many situations.* The following is an example of a 0-1 IP: max 2 = x\ — x2 s.t. xx + 2x2 < 2
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