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## [Help-glpk] if...then...else

**From**: |
Ozgur Ican |

**Subject**: |
[Help-glpk] if...then...else |

**Date**: |
Fri, 25 Aug 2006 12:47:49 +0300 |

**User-agent**: |
KMail/1.7.2 |

Hi,
i have time sets below,
set W; #week
set D; #day
set H; #hour
and a binary decision variable.
var delta{w in W, d in D, h in H},binary;
My question is that;
if delta[w.d,h] = 0 for a specific hour, it has to be equal to zero for the
following 23 hours too.
That is if delta is 0 it has to be 0 for a day-time. How can i model this
situation with "if...then...else".
Also should i put this expression into variable definition part or s.t. part
or anywhere in the .mod file.
I think if i had only one time indice say "t" there is not any problem at all
but in my situation time index has three sub indices
Thanks.
--
o.ican

**[Help-glpk] if...then...else**,
*Ozgur Ican* **<=**