[Help-glpk] Re: Expression

[Andrew Makhorin]

> I'm converting to an expression that wrote of the software LINGO for
> GLPK and I'm struggling, can you help me?
> 
> The expression on Lingo is this:
> 
> ((1 - XE1156D02T3) * (1 - XE1156D03T3)) + ((1 - XE1156D09T3) * (1 -
> XE1156D10T3)) + ((1 - XE1156D16T3) * (1 - XE1156D17T3)) + ((1 -
> XE1156D23T3) * (1 - XE1156D24T3)) + ((1 - XE1156D30T3) * (1 -
> XE1156D31T3)) >= 1;
> 
> I'm trying to use this:
> ((1 - XE1156D02T3)  (1 - XE1156D03T3)) + ((1 - XE1156D09T3)  (1 -
> XE1156D10T3)) + ((1 - XE1156D16T3)  (1 - XE1156D17T3)) + ((1 -
> XE1156D23T3)  (1 - XE1156D24T3)) + ((1 - XE1156D30T3)  (1 -
> XE1156D31T3)) >= 1;
> 
> but I get the following error message: ET276_03_54.lp: 2257: missing
> constraint sense.

Your instance looks like a quadratic program. Note that glpk is intended
to solve LP and MIP only, not QP.