GNU Scientific Library - Bugs: bug #58067, Missing asymptotic behavior of the...
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bug #58067: Missing asymptotic behavior of the airy Ai function
Submitter: | Jackson Vanover <jacksonvanover> | ||
Submitted: | Sat 28 Mar 2020 05:28:49 PM UTC | ||
Category: | Accuracy problem | Severity: | 3 - Normal |
Operating System: | Ubuntu 18.04 | Status: | None |
Assigned to: | None | Open/Closed: | Open |
Release: | 2.6 |
Sat 28 Mar 2020 11:11:49 PM UTC, comment #1: |
Britton Kerin <bkerin> |
Sat 28 Mar 2020 05:28:49 PM UTC, original submission:
Using version 2.6 of GSL from ftp://ftp.gnu.org/gnu/gsl/gsl-2.6.tar.gz
OS is Ubuntu 18.04.2 LTS
Hardware is a Dell workstation with a 3.60 GHz Intel i7-4790 and 32 GB
Compiler is gcc 7.4.0 with the -w option
As the airy Ai function approaches positive infinity, its output goes to
#include <gsl/gsl_sf.h>
int main (void){
printf("%.*f\n", DBL_DIG-1, out);
|
Jackson Vanover <jacksonvanover> |
No files currently attached
Depends on the following items: None found
Items that depend on this one: None found
original submission:
I don't know anything about that function in detail other than that it does indeed appear to approach zero as you say. But it isn't exactly zero, and therefore it seems to me that the GSL behavior is correct. If I intended to approximate the value past some point I would expect to have to do that at the level of the caller of this routine.
Britton