quadratic-irrational: An implementation of quadratic irrationals

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A library for exact computation with quadratic irrationals with support for exact conversion from and to (potentially periodic) simple continued fractions.

A quadratic irrational is a number that can be expressed in the form

(a + b √c) / d

where a, b and d are integers and c is a square-free natural number.

Some examples of such numbers are

A simple continued fraction is a number expressed in the form

a + 1/(b + 1/(c + 1/(d + 1/(e + …))))

or alternatively written as

[a; b, c, d, e, …]

where a is an integer and b, c, d, e, … are positive integers.

Every finite SCF represents a rational number and every infinite, periodic SCF represents a quadratic irrational.

3.5      = [3; 2]
(1+√5)/2 = [1; 1, 1, 1, …]
√2       = [1; 2, 2, 2, …]

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Properties

Versions 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.4, 0.0.5, 0.0.6, 0.1.0, 0.1.1
Change log ChangeLog.md
Dependencies arithmoi (>=0.4 && <0.5), base (>=4.6 && <4.8), containers (>=0.5 && <0.6), mtl (>=2.1 && <2.2), transformers (>=0.3 && <0.4) [details]
License MIT
Copyright Copyright © 2014 Johan Kiviniemi
Author Johan Kiviniemi <devel@johan.kiviniemi.name>
Maintainer Johan Kiviniemi <devel@johan.kiviniemi.name>
Category Math, Algorithms, Data
Home page https://github.com/ion1/quadratic-irrational
Bug tracker https://github.com/ion1/quadratic-irrational/issues
Source repo head: git clone https://github.com/ion1/quadratic-irrational.git
Uploaded by ion at 2014-03-27T21:52:08Z

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Readme for quadratic-irrational-0.0.4

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quadratic-irrational

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A library for exact computation with quadratic irrationals with support for exact conversion from and to (potentially periodic) simple continued fractions.

A quadratic irrational is a number that can be expressed in the form

(a + b √c) / d

where a, b and d are integers and c is a square-free natural number.

Some examples of such numbers are

A simple continued fraction is a number in the form

a + 1/(b + 1/(c + 1/(d + 1/(e + …))))

or alternatively written as

[a; b, c, d, e, …]

where a is an integer and b, c, d, e, … are positive integers.

Every finite SCF represents a rational number and every infinite, periodic SCF represents a quadratic irrational.

3.5      = [3; 2]
(1+√5)/2 = [1; 1, 1, 1, …]
√2       = [1; 2, 2, 2, …]