Re: [Help-glpk] Even integer numbers

[Oscar Gustafsson]

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
>>
>>
>> OPOZORILO: To elektronsko sporoc(ilo in vse njegove morebitne priloge
>> lahko vsebujejo zaupne in/ali privilegirane informacije, ki so last
>> Elektroins(tituta Milan Vidmar in so namenjene izkljuc(no naslovniku.
>> C(e ste sporoc(ilo prejeli pomotoma zaradi napake v naslovu ali pri
>> prenosu sporoc(ila, Vas prosimo, da nas o tem obvestite s povratno
>> pos(to. V tem primeru vsebine prejetega sporoc(ila ne smete uporabiti,
>> kopirati, tiskati, objaviti ali distribuirati, ampak ga morate takoj
>> unic(iti.
>>
>> DISCLAIMER: This e-mail is for the intended recipient only. It
>> contains proprietary information some or all of which may be legally
>> privileged. If you received this e-mail by mistake please notify us by
>> replying to this e-mail. Consequently, the contents of this e-mail
>> must be deleted and not be used, copied, printed, disclosed or
>> distributed.
>>
>>
>>
>> _______________________________________________
>> Help-glpk mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/help-glpk
>
>
>
>---
>Este email está limpo de vírus e malwares porque a proteção do avast! 
>Antivírus está ativa.
>http://www.avast.com
>
>_______________________________________________
>Help-glpk mailing list
>address@hidden
>https://lists.gnu.org/mailman/listinfo/help-glpk