* Abramowitz and Stegun (1964) online
@ 2002-10-09 4:04 Serge Winitzki
2002-10-09 12:04 ` Brian Gough
0 siblings, 1 reply; 11+ messages in thread
From: Serge Winitzki @ 2002-10-09 4:04 UTC (permalink / raw)
To: gsl-discuss
Hi,
Thanks for a great library! I use it in my research.
In the TODO file, I noticed a wish to distribute Abramowitz and Stegun
with GSL. It seems that the old edition Abramowitz and Stegun is now
available online (http://members.fortunecity.com/aadns/) as page images,
total about 50 MB. (Just to let you know.)
Regards,
--
Serge
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: Abramowitz and Stegun (1964) online
2002-10-09 4:04 Abramowitz and Stegun (1964) online Serge Winitzki
@ 2002-10-09 12:04 ` Brian Gough
2002-10-15 6:55 ` gsl_sf_coupling_3j Serge Winitzki
2002-10-19 14:38 ` Abramowitz and Stegun (1964) online Andrea Riciputi
0 siblings, 2 replies; 11+ messages in thread
From: Brian Gough @ 2002-10-09 12:04 UTC (permalink / raw)
To: Serge Winitzki; +Cc: gsl-discuss
Serge Winitzki writes:
> Hi,
> Thanks for a great library! I use it in my research.
Thanks. If you'd like to cite GSL in any papers a suitable reference
is:
GNU Scientific Library Reference Manual, M. Galassi et al,
ISBN 095416170X
> In the TODO file, I noticed a wish to distribute Abramowitz and
> Stegun with GSL. It seems that the old edition Abramowitz and
> Stegun is now available online
> (http://members.fortunecity.com/aadns/) as page images, total about
> 50 MB. (Just to let you know.)
Wow that's good news. I didn't know about it, thanks for posting the
information.
(corrected url for the list: http://members.fortunecity.com/aands/)
Do you have any idea how to contact the person behind it? I could not
find any information on the site itself.
Brian
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: gsl_sf_coupling_3j
2002-10-09 12:04 ` Brian Gough
@ 2002-10-15 6:55 ` Serge Winitzki
2002-10-19 14:38 ` Abramowitz and Stegun (1964) online Andrea Riciputi
1 sibling, 0 replies; 11+ messages in thread
From: Serge Winitzki @ 2002-10-15 6:55 UTC (permalink / raw)
To: Brian Gough; +Cc: gsl-discuss
Filip Floegel writes:
> hello gsl community,
> gsl_sf_coupling_3j doesn't work properly for large angular mementa
The package "matpack" (www.matpack.de) includes many special functions,
also the 3j symbols. They refer to some quite complicated numerical
methods using recursion relations to get the right answers for large
momenta, and to 1975-1976 papers by Schulten and Gordon for the
description of the algorithms. The papers can be downloaded for free at
http://www.ks.uiuc.edu/Publications/Papers/
--
Serge
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: Abramowitz and Stegun (1964) online
2002-10-09 12:04 ` Brian Gough
2002-10-15 6:55 ` gsl_sf_coupling_3j Serge Winitzki
@ 2002-10-19 14:38 ` Andrea Riciputi
2002-10-19 23:07 ` Steve ROBBINS
1 sibling, 1 reply; 11+ messages in thread
From: Andrea Riciputi @ 2002-10-19 14:38 UTC (permalink / raw)
To: gsl-discuss; +Cc: Brian Gough
On Wednesday, October 9, 2002, at 08:41 PM, Brian Gough wrote:
>> In the TODO file, I noticed a wish to distribute Abramowitz and
>> Stegun with GSL. It seems that the old edition Abramowitz and
>> Stegun is now available online
>> (http://members.fortunecity.com/aadns/) as page images, total about
>> 50 MB. (Just to let you know.)
>
> Wow that's good news. I didn't know about it, thanks for posting the
> information.
>
> (corrected url for the list: http://members.fortunecity.com/aands/)
>
> Do you have any idea how to contact the person behind it? I could not
> find any information on the site itself.
>
> Brian
I've tried to download all the pages as described on the site without
success. Someone could tell me how to get them??
Thanks,
Andrea.
---
Andrea Riciputi <mailto:andrea.riciputi@libero.it>
"Science is like sex: sometimes something useful comes out,
but that is not the reason we are doing it" -- (Richard Feynman)
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: Abramowitz and Stegun (1964) online
2002-10-19 14:38 ` Abramowitz and Stegun (1964) online Andrea Riciputi
@ 2002-10-19 23:07 ` Steve ROBBINS
0 siblings, 0 replies; 11+ messages in thread
From: Steve ROBBINS @ 2002-10-19 23:07 UTC (permalink / raw)
To: Andrea Riciputi; +Cc: gsl-discuss
On Sat, Oct 19, 2002 at 09:46:38PM +0200, Andrea Riciputi wrote:
>
> On Wednesday, October 9, 2002, at 08:41 PM, Brian Gough wrote:
>
> >> In the TODO file, I noticed a wish to distribute Abramowitz and
> >> Stegun with GSL. It seems that the old edition Abramowitz and
> >> Stegun is now available online
> >> (http://members.fortunecity.com/aadns/) as page images, total about
> >> 50 MB. (Just to let you know.)
> >
> > Wow that's good news. I didn't know about it, thanks for posting the
> > information.
> >
> > (corrected url for the list: http://members.fortunecity.com/aands/)
> >
> > Do you have any idea how to contact the person behind it? I could not
> > find any information on the site itself.
> >
> > Brian
>
> I've tried to download all the pages as described on the site without
> success. Someone could tell me how to get them??
I used "wget -r" ...
[http://www.gnu.org/software/wget/wget.html]
-Steve
^ permalink raw reply [flat|nested] 11+ messages in thread
* gsl_sf_coupling_3j
@ 2002-12-31 9:55 jdwright
2002-05-21 7:39 ` gsl_sf_coupling_3j jdwright
2002-12-31 9:55 ` gsl_sf_coupling_3j Brian Gough
0 siblings, 2 replies; 11+ messages in thread
From: jdwright @ 2002-12-31 9:55 UTC (permalink / raw)
To: gsl-discuss
Dear gsl users,
Does anyone out there have experience using the "gsl_sf_coupling_3j" routine of
the "gsl_sf_coupling" package? I wonder if the call:
gsl_sf_coupling_3j (two_ja,two_jb,two_jc,two_ma,two_mb,two_mc)
yields accurate results for large values of two_ja, two_jb, and two_jc around 30
with two_ma=0,two_mb=0,two_mc=0.
Thanks,
J. David Wright
Physics Department
Wesleyan University
jdwright@wesleyan.edu
^ permalink raw reply [flat|nested] 11+ messages in thread
* gsl_sf_coupling_3j
2002-12-31 9:55 gsl_sf_coupling_3j jdwright
@ 2002-05-21 7:39 ` jdwright
2002-12-31 9:55 ` gsl_sf_coupling_3j Brian Gough
1 sibling, 0 replies; 11+ messages in thread
From: jdwright @ 2002-05-21 7:39 UTC (permalink / raw)
To: gsl-discuss
Dear gsl users,
Does anyone out there have experience using the "gsl_sf_coupling_3j" routine of
the "gsl_sf_coupling" package? I wonder if the call:
gsl_sf_coupling_3j (two_ja,two_jb,two_jc,two_ma,two_mb,two_mc)
yields accurate results for large values of two_ja, two_jb, and two_jc around 30
with two_ma=0,two_mb=0,two_mc=0.
Thanks,
J. David Wright
Physics Department
Wesleyan University
jdwright@wesleyan.edu
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: gsl_sf_coupling_3j
2002-12-31 9:55 gsl_sf_coupling_3j jdwright
2002-05-21 7:39 ` gsl_sf_coupling_3j jdwright
@ 2002-12-31 9:55 ` Brian Gough
2002-05-21 14:14 ` gsl_sf_coupling_3j Brian Gough
1 sibling, 1 reply; 11+ messages in thread
From: Brian Gough @ 2002-12-31 9:55 UTC (permalink / raw)
To: jdwright; +Cc: gsl-discuss
jdwright@wesleyan.edu writes:
> Dear gsl users,
> Does anyone out there have experience using the
> "gsl_sf_coupling_3j" routine of the "gsl_sf_coupling" package? I
> wonder if the call:
> gsl_sf_coupling_3j (two_ja,two_jb,two_jc,two_ma,two_mb,two_mc)
> yields accurate results for large values of two_ja, two_jb, and
> two_jc around 30 with two_ma=0,two_mb=0,two_mc=0.
> Thanks,
> J. David Wright Physics Department Wesleyan University
> jdwright@wesleyan.edu
The result->error term from the full version of the function
gsl_sf_coupling_3j_e() should give an estimate of the error.
If it's not accurate please send a bug report, thanks. The exact
value could be computed to high precision using GP-PARI, which is free
software.
regards
Brian Gough
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: gsl_sf_coupling_3j
2002-12-31 9:55 ` gsl_sf_coupling_3j Brian Gough
@ 2002-05-21 14:14 ` Brian Gough
0 siblings, 0 replies; 11+ messages in thread
From: Brian Gough @ 2002-05-21 14:14 UTC (permalink / raw)
To: jdwright; +Cc: gsl-discuss
jdwright@wesleyan.edu writes:
> Dear gsl users,
> Does anyone out there have experience using the
> "gsl_sf_coupling_3j" routine of the "gsl_sf_coupling" package? I
> wonder if the call:
> gsl_sf_coupling_3j (two_ja,two_jb,two_jc,two_ma,two_mb,two_mc)
> yields accurate results for large values of two_ja, two_jb, and
> two_jc around 30 with two_ma=0,two_mb=0,two_mc=0.
> Thanks,
> J. David Wright Physics Department Wesleyan University
> jdwright@wesleyan.edu
The result->error term from the full version of the function
gsl_sf_coupling_3j_e() should give an estimate of the error.
If it's not accurate please send a bug report, thanks. The exact
value could be computed to high precision using GP-PARI, which is free
software.
regards
Brian Gough
^ permalink raw reply [flat|nested] 11+ messages in thread
* gsl_sf_coupling_3j
@ 2002-10-02 8:46 Filip Floegel
2002-10-03 13:21 ` gsl_sf_coupling_3j Brian Gough
0 siblings, 1 reply; 11+ messages in thread
From: Filip Floegel @ 2002-10-02 8:46 UTC (permalink / raw)
To: gsl-discuss
hello gsl community,
gsl_sf_coupling_3j doesn't work properly for large
angular mementa like j1=j2=j3=40 m1=m2=m3=0 !!!
gsl_sf_coupling_3j_e(80,80,80,0,0,0,&result)
which correspond to j1=j2=j3=40 m1=m2=m3=0
gives me:
result.val = 0.0625
result.err = 0.172766
mathematica gives me:
N[ThreeJSymbol[{40,0},{40,0},{40,0}]] = 0.0149685
my guess is that gamma.c which is used for calculating fractional
numbers probably diverges for large integers.
cheers,
ff
--
+---------------------------------------------------------------+
| dipl.phys. Filip Floegel e-mail:floegel@itp.uni-hannover.de |
| ITP/Universitaet Hannover phone: 0511/762-3381 |
| Appelstr.2 fax: 0511/762-4945 |
| 30167 Hannover |
| |
+---------------------------------------------------------------+
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: gsl_sf_coupling_3j
2002-10-02 8:46 gsl_sf_coupling_3j Filip Floegel
@ 2002-10-03 13:21 ` Brian Gough
0 siblings, 0 replies; 11+ messages in thread
From: Brian Gough @ 2002-10-03 13:21 UTC (permalink / raw)
To: Filip Floegel; +Cc: gsl-discuss
Filip Floegel writes:
> hello gsl community,
> gsl_sf_coupling_3j doesn't work properly for large angular mementa
> like j1=j2=j3=40 m1=m2=m3=0 !!!
> gsl_sf_coupling_3j_e(80,80,80,0,0,0,&result)
> which correspond to j1=j2=j3=40 m1=m2=m3=0
> gives me:
> result.val = 0.0625 result.err = 0.172766
> mathematica gives me:
> N[ThreeJSymbol[{40,0},{40,0},{40,0}]] = 0.0149685
> my guess is that gamma.c which is used for calculating fractional
> numbers probably diverges for large integers.
Thanks for the bug report.
If you can take a look at the source maybe a different expansion can
be used for large values to improve the accuracy?
Brian
^ permalink raw reply [flat|nested] 11+ messages in thread
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2002-10-09 4:04 Abramowitz and Stegun (1964) online Serge Winitzki
2002-10-09 12:04 ` Brian Gough
2002-10-15 6:55 ` gsl_sf_coupling_3j Serge Winitzki
2002-10-19 14:38 ` Abramowitz and Stegun (1964) online Andrea Riciputi
2002-10-19 23:07 ` Steve ROBBINS
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2002-12-31 9:55 gsl_sf_coupling_3j jdwright
2002-05-21 7:39 ` gsl_sf_coupling_3j jdwright
2002-12-31 9:55 ` gsl_sf_coupling_3j Brian Gough
2002-05-21 14:14 ` gsl_sf_coupling_3j Brian Gough
2002-10-02 8:46 gsl_sf_coupling_3j Filip Floegel
2002-10-03 13:21 ` gsl_sf_coupling_3j Brian Gough
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