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https://github.com/jj/p6-math-constants
A few Mathematics and Physics constants
https://github.com/jj/p6-math-constants
hacktoberfest math physics
Last synced: 3 months ago
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A few Mathematics and Physics constants
- Host: GitHub
- URL: https://github.com/jj/p6-math-constants
- Owner: JJ
- License: gpl-3.0
- Created: 2016-12-30T07:51:55.000Z (about 8 years ago)
- Default Branch: master
- Last Pushed: 2023-10-18T06:05:28.000Z (over 1 year ago)
- Last Synced: 2024-10-03T17:53:35.467Z (4 months ago)
- Topics: hacktoberfest, math, physics
- Language: Raku
- Homepage:
- Size: 110 KB
- Stars: 8
- Watchers: 6
- Forks: 11
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- Changelog: Changes
- Contributing: CONTRIBUTING.md
- License: LICENSE
Awesome Lists containing this project
README
Math::Constants [](https://github.com/JJ/p6-math-constants/actions/workflows/test.yaml)
===============
[](https://raku.land/zef:jjmerelo/Math::Constants)
Math::Constants - A few constants defined in Raku
SYNOPSIS
========
```raku
#!/usr/bin/env raku
use Math::Constants;
say "We have ", phi, " ", plancks-h, " ", plancks-reduced-h, " ",
c, " ", G, " and ", fine-structure-constant, " plus ",
elementary-charge, " and ", vacuum-permittivity ;
say "And also φ ", φ, " α ", α, " ℎ ", ℎ, " and ℏ ", ℏ,
" with e ", e, " and ε0 ", ε0;
say "We are flying at speed ", .1c;
```
DESCRIPTION
===========
Math::Constants is a collection of Math and Physics constants that will save you the trouble of defining them.
Constants included
------------------
### Physical constants
All the physical constants have the [CODATA 2018](https://www.nist.gov/publications/codata-recommended-values-fundamental-physical-constants-2018) recommended values. These
reflect the new definitions of the kilogram and ampere as of 2019-05-20.
* [Gravitational constant](https://en.wikipedia.org/wiki/Gravitational_constant) as `gravitation-constant` and `G`.
* [Speed of light](https://en.wikipedia.org/wiki/Speed_of_light) as `speed-of-light-vacuum` and `c`. It works also as a suffix for expressing speeds, as in `3c` for 3 times the speed of light.
* [Planck constant and reduced constant](https://en.wikipedia.org/wiki/Planck_constant) in J/s as `plancks-h` or `ℎ` and `plancks-reduced-h` or `ℏ`.
* [Boltzmann constant](https://en.wikipedia.org/wiki/Boltzmann_constant) as `boltzmann-constant` or `k`. Previous versions of Math::Constants had this in eV. The value is now in standard SI units. The eV postfix operator can be used to get the previous value if needed.
* [Coulomb constant](https://en.wikipedia.org/wiki/Coulomb_constant) as `coulomb-constant` or `K0`.
* [Mass of an electron](https://en.wikipedia.org/wiki/Electron) as `electron-mass`.
* [Electron volt](https://en.wikipedia.org/wiki/Electronvolt) as `electron-volt` and `eV` or as an operator.
* [Elementary charge](https://en.wikipedia.org/wiki/Elementary_charge) as `elementary-charge` or `q`.
* [Faraday constant](https://en.wikipedia.org/wiki/Faraday_constant) as `faraday-constant` or `F`.
* [The fine structure constant](https://en.wikipedia.org/wiki/Fine_structure) as `fine-structure-constant` or `α`.
* [Gas constant](https://en.wikipedia.org/wiki/Gas_constant) as `gas-constant` or `R`.
* [Avogadro's constant](https://en.wikipedia.org/wiki/Avogadro_constant) as `avogadro-constant` or `L`.
* [Vacuum magnetic permeability](https://en.wikipedia.org/wiki/Vacuum_permeability) as `magnetic-permeability` or `μ0`.
* [Mass of a neutron](https://en.wikipedia.org/wiki/Neutron) as `neutron-mass`.
* [Planck length](https://en.wikipedia.org/wiki/Planck_length) as `planck-length` or `lp`.
* [Planck mass](https://en.wikipedia.org/wiki/Planck_mass) as `planck-mass` or `mp`.
* [Planck temperature](https://en.wikipedia.org/wiki/Planck_temperature) as `planck-temperature` or `Tp`.
* [Planck time](https://en.wikipedia.org/wiki/Planck_time) as `planck-time` or `tp`.
* [Mass of a proton](https://en.wikipedia.org/wiki/Proton) as `proton-mass`.
* The quantum ratio (elementary charge / Planck constant) as `quantum-ratio`.
* [Standard acceleration due to gravity](https://en.wikipedia.org/wiki/Standard_gravity) as `standard-acceleration-gravity` or `g`.
* [Vacuum electrical permittivity](https://en.wikipedia.org/wiki/Vacuum_permittivity) as `vacuum-permittivity` or `ε0`.
### Mathematical constants
* [Golden ratio](https://en.wikipedia.org/wiki/Golden_ratio) as `phi` or `φ`.
* [Feigenbaum constants](https://en.wikipedia.org/wiki/Feigenbaum_constants) as `alpha-feigenbaum-constant` and `delta-feigenbaum-constant` or `δ`.
* [Apéry's constant](https://en.wikipedia.org/wiki/Ap%C3%A9ry%27s_constant) as `apery-constant`.
* [Conway's constant](https://en.wikipedia.org/wiki/Look-and-say_sequence#Growth_in_length) as `conway-constant` and `λ`.
* [Khinchin's constant](https://en.wikipedia.org/wiki/Khinchin%27s_constant) as `khinchin-constant` and `k0`.
* [Glaisher–Kinkelin constant](https://en.wikipedia.org/wiki/Glaisher%E2%80%93Kinkelin_constant) as `glaisher-kinkelin-constant` and `A`.
* [Golomb–Dickman constant](https://en.wikipedia.org/wiki/Golomb%E2%80%93Dickman_constant) as `golomb-dickman-constant`.
* [Catalan's constant](https://en.wikipedia.org/wiki/Catalan%27s_constant) as `catalan-constant`.
* [Mill's constant](https://en.wikipedia.org/wiki/Mills%27_constant) as `mill-constant`.
* [Gauss's constant](https://en.wikipedia.org/wiki/Gauss%27s_constant) as `gauss-constant`.
* [Euler–Mascheroni constant](https://en.wikipedia.org/wiki/Euler%E2%80%93Mascheroni_constant) as `euler-mascheroni-gamma` and `γ`.
* [Sierpiński's constant](https://en.wikipedia.org/wiki/Sierpi%C5%84ski%27s_constant) as `sierpinski-gamma` and `K`.
* [iⁱ](https://oeis.org/A049006)
* [ζ(2)](https://oeis.org/A013661)
### Units
"Units" can be used as suffix; the number will be multiplied by its value
* `eV`, or electron-volts; `1.3eV` is 1.3 divided by the `eV` constant value.
* `c`, speed of light.
* `g`, gravitational constant.
Issues and suggestions
======================
Please post them [in GitHub](https://github.com/JJ/p6-math-constants/issues
). Pull requests are also welcome.
See also
========
Check out [Physics::Constants](https://raku.land/zef:librasteve/Physics
::Constants) for an extensive collection of objects that use the [Physics
::Measure](https://github.com/librasteve/raku-Physics-Measure) objects.
AUTHOR
======
* JJ Merelo
* Kevin Pye
* [`librasteve`](https://github.com/librasteve)
COPYRIGHT AND LICENSE
=====================
Copyright 2016-2023 JJ Merelo
Copyright 2019 Kevin Pye
This library is free software; you can redistribute it and/or modify it under the GPL 3.0.