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Re: [Help-gsl] Semantics of gsl_siman_metric_t

From: Saqib Ilyas
Subject: Re: [Help-gsl] Semantics of gsl_siman_metric_t
Date: Thu, 23 Dec 2010 10:32:20 +0500

Great, thanks guys!

On Thu, Dec 23, 2010 at 2:35 AM, Marco Maggi <address@hidden>wrote:

> "Marco Maggi" write:
> >"Saqib Ilyas" wrote:
> >> The  documentation says that  the GSL  Simulated Annealing
> >> function  gsl_siman_metric_t(void *xp,  void  *yp), should
> >> return  the  distance between  two  configurations xp  and
> >> yp. Semantically, should it be, x - y or y - x?
> >
> > Probably it was meant to be "x-y",
> If you interpret it in strict math terms, it does not matter
> of course: "distance"  means that d(x, y) =  d(y, x).  Since
> it is not used in GSL's siman, nobody knows.
> --
> Marco Maggi

Muhammad Saqib Ilyas
PhD Student, Computer Science and Engineering
Lahore University of Management Sciences

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