Re: [Gm2] Numerical library in Modula-2

[john o goyo]

Greetings, Andreas:

On 02/11/2017 10:13, Fischlin Andreas wrote:
> Dear Michael,
>
> Sounds all quite interesting.
>
> In terms of the different REAL types, that is quite an important 
> aspect not trivial. Have you looked at our environment? I believe we 
> have there quite nice and highly portable code that can accommodate 
> many needs in terms of numerics as it depends on precision, yet 
> allowing client code to be quite flexible and needing basically almost 
> no change when changing compilers, hardware, or operating systems, 
> despite the many definitions of elementary types for real numbers.
There are many interesting things here but the releases appear to be 
binary only. In particular, your download page (at 
http://www.sysecol.ethz.ch/ramses/downloads.html) indicates that the 
Solaris Sparc releases were compiled with EPC Modula-2. EPC is gone and 
I do not have the compiler. Was your source released?

Sincerely,
john

> Here some links of interest in this context:
>
> DMPortab 
> <http://se-server.ethz.ch/RAMSES/Objects/DM/DMPortab.html#DMPortab>
> DMFloatEnv 
> <http://se-server.ethz.ch/RAMSES/Objects/DM/DMFloatEnv.html#DMFloatEnv>
> DMMathLib 
> <http://se-server.ethz.ch/RAMSES/Objects/DM/DMMathLib.html#DMMathLib>
> DMLongMathLib 
> <http://se-server.ethz.ch/RAMSES/Objects/DM/DMLongMathLib.html#DMLongMathLib>
> DMConversions 
> <http://se-server.ethz.ch/RAMSES/Objects/DM/DMConversions.html#DMConversions>
>
> Above ‘Dialog Machine' modules are implemented in a manner that they 
> adjust to the underlying hardware (e.g. little vs. big Endian storage 
> of REAL numbers for satisfying IEEE floating point standards etc.).
>
> Perhaps this is of interest? Modules based on this foundation doing 
> similar things your package does are then also available (SciLib 
> <http://www.sysecol.ethz.ch/ramses/ramses-software-layers/science-library-scilib.html>, 
> AuxLib 
> <http://www.sysecol.ethz.ch/ramses/ramses-software-layers/auxiliary-library-auxlib.html>), 
> but that is another topic, I guess less of interest to you.
>
> Regards,
> Andreas
>
> Cited References:
> ------------------------
> IEEE Std 754-2008, 2008. IEEE standard for binary floating-point 
> arithmetic. ANSI/IEEE Std 754-2008, (IEEE Product No. SH10116-TBR) 
> http://standards.ieee.org/findstds/standard/754-2008.html Ie003
>
> ETH Zurich
> Prof. em. Dr. Andreas Fischlin
> IPCC Vice-Chair WGII
> Systems Ecology - Institute of Biogeochemistry and Pollutant Dynamics
> Universitaetstrasse 16, CHN E 24
> 8092 Zurich
> SWITZERLAND
>
> address@hidden <mailto:address@hidden>
> www.sysecol.ethz.ch/Staff/af <http://www.sysecol.ethz.ch/Staff/af>
>
> +41 44 633-6090 phone
> +41 79 595-4050 mobile
>
> Make it as simple as possible, but distrust it!
> ________________________________________________________________________
>
>
>
>
>
>
>
>
> On 30/10/2017, at 19:12, Michael Riedl <address@hidden 
> <mailto:address@hidden>> wrote:
>
> > Gaius,
> >
> > noticed that my feedback to the new package had been addressed only 
> > to your personal mailbox ...
> >
> >
> > All,
> >
> >
> > I developed a library of numerical procedures in Modula-2 for my private
> > projects which I would like to share with others. I already was in 
> > email conversation about that with Gaius quite some time ago.
> >
> > Now I am "near" ready with the packages and I think it's time to include
> > the whole community in the communication - otherwise I will always 
> > find stuff to be improved
> > before doing the next step ... such a thing has a tendency to never 
> > become "ready".
> >
> > The library has, among other, procedures for
> >
> > - Numerical integration & differentiation
> > - Special functions (Gamma, Student, Hankel, ... )
> > - Fourier transformation
> > - Random number generators
> > - Matrix routine (Matrix times vector, Matrix times Matrix, ...)
> > - Solving linear equations
> > - Eigenvalue- and vectors
> > (real symmetric, real general, complex hermitian, complex general)
> > - Singular value decomposition
> > - Multidimensional function optimization routines
> >
> >
> > The whole library is about 25.000 lines of code (not including the 
> > def-files)
> > which I would like to put to the public under the GPL/LGPL.
> >
> > Here I am looking for some support for
> >
> > - further testings and cleanups
> > - get some more systematic in the test routines
> > (not that well structured at the moment)
> > - documentation
> > (most of the def files are in German, here we need to have it at least
> > bi-lingual)
> > - other improvements & checks
> >
> > At the moment I still develop this with Excelsior XDS compiler but I
> > think it's time to change that ... but I suppose that this will not
> > be that big deal at all - maybe the different sizes of REAL types
> > need to be considered, but that's something I would like to discuss.
> >
> > Furthermore I wrote a complete IO library and some applications based on
> > the libraries mostly for chemistry related topics (spectra analysis with
> > principal component analysis and PLS including a library for genetic
> > algorithms, small library for Fourier transform spectroscopy, a small
> > quantum mechanical calculation routine including an experimental 
> > interface
> > to OpenMPI).
> >
> > Also would like to share all of the in one of the next steps, but 
> > reviewing the about 40.000 lines of code may take some time.
> >
> > At the moment I am still doing some clean-ups but if someone in the
> > audience is already interested in one of the topics drop me a mail and I
> > can send copies via email. Or we already find a nice place to share it
> > for all who might be interested.
> >
> > Gajus already kindly offered me with some support concerning configure
> > and makefiles.
> >
> > Any feedback is welcome.
> >
> > Gruß
> >
> > Michael
> >
> >
> > _______________________________________________
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>
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