NAME

Math::Libgsl::Elementary - An interface to libgsl, the Gnu Scientific Library - elementary functions.

SYNOPSIS

use Math::Libgsl::Elementary :ALL;

DESCRIPTION

Math::Libgsl::Elementary provides an interface to the Elementary Functions in the libgsl, the GNU Scientific Library.

This package provides both the low-level interface to the C library (Raw) and a more comfortable interface layer for the Raku programmer.

Math::Libgsl::Elementary makes these tags available:

• :elem

• :smallint

sub log1p(Num() $x --> Num) is export(:elem)

Computes the value of log(1 + x).

sub expm1(Num() $x --> Num) is export(:elem)

Computes the value of exp(x) - 1.

sub hypot(Num() $x, Num() $y --> Num) is export(:elem)

Computes the value of sqrt(x² + y²).

sub hypot3(Num() $x, Num() $y, Num() $z --> Num) is export(:elem)

Computes the value of sqrt(x² + y² + z²).

sub ldexp(Num() $x, Int $e --> Num) is export(:elem)

Computes the value of x * 2ᵉ.

sub frexp(Num() $x --> List) is export(:elem)

Computes the value of f such that x = f * 2ᵉ. It returns a list of two values: f and e.

sub int-pow(Num() $x, Int $e --> Num) is export(:smallint)

Computes the value of xᵉ with e ∈ ℤ.

sub uint-pow(Num() $x, UInt $e --> Num) is export(:smallint)

Computes the value of xᵉ with e ∈ ℕ.

sub pow2(Num() $x --> Num) is export(:smallint)

Computes the value of x².

sub pow3(Num() $x --> Num) is export(:smallint)

Computes the value of x³.

sub pow4(Num() $x --> Num) is export(:smallint)

Computes the value of x⁴.

sub pow5(Num() $x --> Num) is export(:smallint)

Computes the value of x⁵.

sub pow6(Num() $x --> Num) is export(:smallint)

Computes the value of x⁶.

sub pow7(Num() $x --> Num) is export(:smallint)

Computes the value of x⁷.

sub pow8(Num() $x --> Num) is export(:smallint)

Computes the value of x⁸.

sub pow9(Num() $x --> Num) is export(:smallint)

Computes the value of x⁹.

C Library Documentation

For more details on libgsl see https://www.gnu.org/software/gsl/. The excellent C Library manual is available here https://www.gnu.org/software/gsl/doc/html/index.html, or here https://www.gnu.org/software/gsl/doc/latex/gsl-ref.pdf in PDF format.

Prerequisites

This module requires the libgsl library to be installed. Please follow the instructions below based on your platform:

Debian Linux and Ubuntu 20.04

sudo apt install libgsl23 libgsl-dev libgslcblas0

That command will install libgslcblas0 as well, since it's used by the GSL.

Ubuntu 18.04

libgsl23 and libgslcblas0 have a missing symbol on Ubuntu 18.04. I solved the issue installing the Debian Buster version of those three libraries:

• http://http.us.debian.org/debian/pool/main/g/gsl/libgslcblas0_2.5+dfsg-6_amd64.deb

• http://http.us.debian.org/debian/pool/main/g/gsl/libgsl23_2.5+dfsg-6_amd64.deb

• http://http.us.debian.org/debian/pool/main/g/gsl/libgsl-dev_2.5+dfsg-6_amd64.deb

Installation

To install it using zef (a module management tool):

$ zef install Math::Libgsl::Elementary

AUTHOR

Fernando Santagata nando.santagata@gmail.com

COPYRIGHT AND LICENSE

Copyright 2020 Fernando Santagata

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.