Re: [Help-glpk] Even integer numbers

[Antonio Carlos Moretti]

I understood he was asking how to model this.
A

> Or easier:
>
> X, Xhalf \in {0, 1, 2, ...}
>
> X = 2*Xhalf
>
> BR Oscar
>
> Skickat från min Sony Ericsson Xperia pro
>
> ANTONIO MORETTI <address@hidden> skrev:
>
>>Zvonko,
>>you may use binary variables to solve this problem, but, x must have a
>>upper bound.
>>For example, suppose x <= 10 and x \in \{2,4,6,8,10 \}, then define a
>>binary variable
>>
>>Y_j = 1 , if x = 2*j  or 0,  otherwise for j = 1,2,3,4,5
>>
>>Therefore, x = 2*y_1 + 4*y_2 + 6*y_3 + 8*y_4 + 10*y_5
>>                   y_1 + y_2 + y_3 + y_4 + y_5 = 1
>>
>>I hope this helps.
>>
>>Antonio
>>
>>Em 01/10/2014 08:31, Zvonko Bregar escreveu:
>>>
>>> Hi everybody,
>>>
>>> Does there exist an expression
>>>
>>> That forces
>>>
>>> An integer variable X \in { 1, 2, 3, ...}
>>>
>>> To take the values only from even numbers
>>>
>>> X \in {2, 4, 6, ...}
>>>
>>> Regards,
>>>
>>> --Zvonko
>>>
>>>
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