[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-glpk] [Fwd: adding constraints incrementally]

From: Alireza Vazifedoost
Subject: Re: [Help-glpk] [Fwd: adding constraints incrementally]
Date: Wed, 14 Nov 2012 01:29:12 -0800 (PST)

Hi Raniere,
Actually, my constraint matrix can't be fit in the memory of my machine. So, I assume that in cutting plane method, we don't need to retain all the constraints in memory, So, can you please tell me more about the restriction you mentioned?
Best regards,

From: Raniere Gaia Silva <address@hidden>
To: Alireza Vazifedoost <address@hidden>
Cc: Xypron <address@hidden>; "address@hidden" <address@hidden>
Sent: Wednesday, November 14, 2012 5:14 PM
Subject: Re: [Help-glpk] [Fwd: adding constraints incrementally]

Hi Alizera,
yes, theoretically is possible to solve your problem using callback functions.

In practice, it will depende of how much large is your data set.


On Wed, Nov 14, 2012 at 12:22 AM, Alireza Vazifedoost
<address@hidden> wrote:
> Dear Xypron,
> Thank you very much, I just subscribed to the list. So about my question,
> you think then this is theoretically possible to solve my problem by
> callback functions?
> Regards.
> Alreva
> ________________________________
> From: Xypron <address@hidden>
> To: alreva <address@hidden>
> Cc: address@hidden
> Sent: Saturday, November 10, 2012 2:13 AM
> Subject: Re: [Help-glpk] [Fwd: adding constraints incrementally]
> Dear Alreva,
> your mail had to be forwarded manually because you are not subscribed to
> the GLPK help list, cf.
> The source distribution of GLPK is available at
> In glpk-4.47/doc/glpk.pdf read the following chapters:
> 5.4 The cut pool routines
> 5.1.1 Using the callback routine
> Best regards
> Xypron
> On 09.11.2012 10:48, Andrew Makhorin wrote:
>> -------- Forwarded Message --------
>> To: address@hidden
>> Subject: [Help-glpk] adding constraints incrementally
>> Date: Fri, 9 Nov 2012 00:57:10 -0800 (PST)
>> Dear all,
>> I have a LP problem with a huge number of constraints which are saved into
>> a
>> large file. The problem is that I can't load this file into memory to use
>> the constraints. I was thinking about using the cutting plane method in
>> to solve the problem. However, I don't know whether it is possible to add
>> constraints incrementally as cutting planes to a problem object, and
>> perhaps
>> remove some of them ?
>> Bests,
>> Alreva
> _______________________________________________
> Help-glpk mailing list
> address@hidden

reply via email to

[Prev in Thread] Current Thread [Next in Thread]