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[Bug-gsl] [bug #47401] Bessel K0/K1


From: Patrick Alken
Subject: [Bug-gsl] [bug #47401] Bessel K0/K1
Date: Sun, 13 Mar 2016 19:46:51 +0000
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:44.0) Gecko/20100101 Firefox/44.0

URL:
  <http://savannah.gnu.org/bugs/?47401>

                 Summary: Bessel K0/K1
                 Project: GNU Scientific Library
            Submitted by: psa
            Submitted on: Sun 13 Mar 2016 07:46:50 PM GMT
                Category: Runtime error
                Severity: 3 - Normal
        Operating System: 
                  Status: None
             Assigned to: None
             Open/Closed: Open
                 Release: 
         Discussion Lock: Any

    _______________________________________________________

Details:

I am sending you my findings about bessel_k0/bessel_k1
functions. Both suffer from cancellation near x=2, which is easily fixable.

I include PDF with description and patch for bessel_k0.c
The bessel_k1.c can be changed the same way.




    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Sun 13 Mar 2016 07:46:50 PM GMT  Name: bessel_k0.patch  Size: 3kB   By:
psa

<http://savannah.gnu.org/bugs/download.php?file_id=36623>
-------------------------------------------------------
Date: Sun 13 Mar 2016 07:46:50 PM GMT  Name: GSL-K01.pdf  Size: 301kB   By:
psa

<http://savannah.gnu.org/bugs/download.php?file_id=36624>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?47401>

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