conditional mip

GAMS
1

Hi,

I want to model this condition in gams:

if (x1+x2+x3+x4 >= 2) then (x5+x6+x7+x8+x9+x10>= 3)

all the xi variable are binary variables.

Thanks

Best Regards,
A. Yazdanbakhsh

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2

Hi Amir
try to modify your model using approaches for these kind of constrain.
you Can’t use “if” in your model. it’ not related to GAMS. it’s
related to your modeling.

best

On 3/18/12, Amir Yazdanbakhsh wrote:

Hi,

I want to model this condition in gams:

if (x1+x2+x3+x4 >= 2) then (x5+x6+x7+x8+x9+x10>= 3)

all the xi variable are binary variables.

Thanks

Best Regards,
A. Yazdanbakhsh

–
“gamsworld” group.
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to
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For more options, visit this group at
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– Babak Saleck Pay M.Sc Socio-Economic System Engineering Group of Industrial Engineering University of Tehran Tehran,Iran

3

Hi Amir,

On Mar 18, 11:39 am, Amir Yazdanbakhsh
wrote:

Hi,

I want to model this condition in gams:

if (x1+x2+x3+x4 >= 2) then (x5+x6+x7+x8+x9+x10>= 3)

all the xi variable are binary variables.

This is probably a question best asked during office hours, at the
beginning of class, or on the Piazza forum for our class.
Thanks.

-Jeff Linderoth, Professor
Dept. of Industrial and Systems Engineering
University of Wisconsin-Madison
O: 608-890-1931
http://www.engr.wisc.edu/ie/faculty/linderoth_jeffrey.html

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