Re: [Bug-gsl] Electron charge in CGS(E)

[Evgeny Kurbatov]

On Tue, 21 Jul 2009 13:03:48 +0100
Brian Gough <address@hidden> wrote:

> At Mon, 20 Jul 2009 13:06:13 +0400,
> Evgeny Kurbatov wrote:
> > If the idea of gsl_const_cgs.h was to contain the constants from
> > base CGS system only, we have to remove electron charge from it,
> > then create gsl_const_cgse.h for right CGSE values.  Actually we
> > have to add constants of vacuum permittivity and permeability for
> > completeness.  If nobody dealing with it, I can because I'm
> > interested in it.
> 
> The original situation was that I generated the 'cgs' values from
> another source (GNU Emacs Calc) without checking what conversion it
> used, simply assuming that it was correct. This resulted in some of
> the electromagnetic values having inconsistent units.
> 
> So we migrated to gsl_const_cgsm.h to get away from that.
> 
> Your idea of creating gsl_const_cgse.h and removing old
> electromagnetic constants from gsl_const_cgs.h sounds like a good one.
> I have not attempted it due to lack of familiarity with the different
> CGS systems, so I would be happy for anyone to have a go.
> 
> One issue is that the whole set of files is generated by Emacs Calc
> (which has a multiple-precision unit conversion system), so it
> requires some knowledge of Emacs Lisp and Calc to add new sets of
> units.  The system is capable of handling arbitrary unit systems, but
> unfortunately somewhat complicated.

Ok, I'm ready to go. :)  Could you give me an existing scripts for this
transformation?  My plan is:
(i) clean-up gsl_const_cgs.h (remove
non-basic constants from it) and gsl_const_cgsm.h (remove basic
constants which will be included from gsl_const_cgs.h)
(ii) make gsl_const_cgse.h and add into it and into gsl_const_cgsm.h
some more electromagnetic constants.

Best witches,
Evgeny