Math::GSL::Sys(3pm)

📦
version 0.49 · 6 versions
, in ubuntu stonking

💖 Math::GSL::Sys(3pm) — the perl doc you're reading rn 💖

okay bestie, so this is the User Contributed Perl Documentation page for Math::GSL::Sys, and it's literally the little grab-bag module of math functions that the standard libraries just… didn't give you?? iconic of it honestly 🫶

✨ NAME ✨

Math::GSL::Sys — Misc Math Functions 🌈

(yes that's it, that's the whole name, it's giving "no notes" 💅)

✨ SYNOPSIS ✨

use Math::GSL::Sys qw/:all/;

one line and you've got the whole toolbox, periodt ✨

✨ DESCRIPTION ✨

So this module is like the friend who shows up with various useful math functions that standard libraries do NOT usually hand you. Very much main character energy 👑

Here's the whole lineup, no skipping, we don't do that here:

  • gsl_log1p($x) — computes the value of \log(1+$x), but in a way that stays accurate for small $x. It's the alternative to the BSD math function log1p(x). 🍓
  • gsl_expm1($x) — computes the value of \exp($x)-1, again accurate for small $x. Alternative to the BSD math function expm1(x). ✨
  • gsl_hypot($x, $y) — computes the value of \sqrt{$x^2 + $y^2} in a way that avoids overflow. Alternative to the BSD math function hypot($x,$y). 🦋
  • gsl_hypot3($x, $y, $z) — computes the value of \sqrt{$x^2 + $y^2 + $z^2} and yeah, it also avoids overflow. three-arg icon 💅
  • gsl_acosh($x) — computes the value of \arccosh($x). Alternative to the standard math function acosh($x).
  • gsl_asinh($x) — computes the value of \arcsinh($x). Alternative to the standard math function asinh($x).
  • gsl_atanh($x) — computes the value of \arctanh($x). Alternative to the standard math function atanh($x).
  • gsl_isnan($x) — returns 1 if $x is not-a-number. that's the whole job bestie.
  • gsl_isinf($x) — returns +1 if $x is positive infinity, -1 if $x is negative infinity, and 0 otherwise. three moods 🎀
  • gsl_finite($x) — returns 1 if $x is a real number, and 0 if it's infinite or not-a-number. vibe check: passed or not passed 💀
  • gsl_posinf — …
  • gsl_neginf — …
  • gsl_fdiv — …
  • gsl_coerce_double — …
  • gsl_coerce_float — …
  • gsl_coerce_long_double — …
ngl bestie, those last six are listed on the page with zero description, just the bare names, so I am NOT about to invent lore for them 🙈 that's the whole listing, fr fr.
  • gsl_ldexp($x, $e) — computes the value of $x * 2**$e. Alternative to the standard math function ldexp($x,$e). 🔥
  • gsl_frexp($x) — splits the number $x into its normalized fraction f and exponent e, such that $x = f * 2^e and 0.5 <= f < 1. The function returns f and then the exponent in e. If $x is zero, both f and e are set to zero. It's the alternative to the standard math function frexp(x, e). ✨
  • gsl_fcmp($x, $y, $epsilon) — this one determines whether $x and $y are approximately equal to a relative accuracy $epsilon. The relative accuracy is measured using an interval of size 2 \delta, where \delta = 2^k \epsilon and k is the maximum base-2 exponent of $x and $y as computed by the function frexp. If $x and $y lie within this interval, they're considered approximately equal and the function returns 0. Otherwise, if $x < $y it returns -1, or if $x > $y it returns +1.
⚠️ ok important: $x and $y are compared to relative accuracy, so this function is NOT suitable for testing whether a value is approximately zero. read that again bestie, it matters 😭

The implementation is based on the package fcmp by T.C. Belding. (shoutout 🫶)

If you want the deep lore on all of these functions, the page sends you straight to the GSL official documentation: <http://www.gnu.org/software/gsl/manual/html_node/> 📚

🌸 AUTHORS 🌸

Jonathan "Duke" Leto <jonathan@leto.net> and Thierry Moisan <thierry.moisan@gmail.com> — the two queens who made this happen 👑👑

Copyright (C) 2008-2024 Jonathan "Duke" Leto and Thierry Moisan

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

(so like, go wild, but the same terms as Perl itself, okay? 💖)

and that's a wrap on Math::GSL::Sys(3pm) from the User Contributed Perl Documentation collection, this version rendered by perl v5.42.3 on 2026-08-20 — thanks for reading to the end bestie, you ate that 💅✨🦋

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