GNU Scientific Library - Bugs: bug #57978, Incorrect result from cosine...
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bug #57978: Incorrect result from cosine function with inf input
Submitter: | Jackson Vanover <jacksonvanover> | ||
Submitted: | Mon 09 Mar 2020 08:48:52 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 05:05:00 PM UTC, comment #1: |
Jackson Vanover <jacksonvanover> |
Mon 09 Mar 2020 08:48:52 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
Description: when passing positive infinity to gsl_sf_cos_pi, the
#include <gsl/gsl_sf.h>
int main(void){
printf("%f\n", out);
|
Jackson Vanover <jacksonvanover> |
No files currently attached
Depends on the following items: None found
Items that depend on this one: None found
Behavior also observed in gsl_sf_sin_pi
#include <gsl/gsl_sf.h>
#include <stdio.h>
#include <gsl/gsl_math.h>
int main (void){
double out;
out = gsl_sf_sin_pi(GSL_POSINF);
printf("%f\n", out); // prints zero
return 0;
}