# gcd

# Greatest Common Divisor Notations

In mathematics, The greatest common divisor of two positive integers \(a\) and \(b\), denoted \(GCD(a,b)\).

### Semantic

- OpenMath's combinat1/gcd
- MathML's gcd element
- MathWorld's Greatest common divisor
- Wikipedia's Greatest common divisor

### Observations of GCD

#### Arabic

In Saudi math book for grad VII we find in page number 75 the example shows gcd as '?.?.?' for 63 and 42 in Arabic language.

#### English

In Bibliography we find in page 191 this book shows the greatest common divisor in English.

#### German

As found in Bibliography the German book shows the greatest common divisor in page 307.

#### Dutch

In Bibliography the Dutch book shows the greatest common divisor in page 81.

See also the symbol in the Dutch book Basisboek Wiskunde page 21.

Also used is , as seen in Relaties en Structuren (page 48).

#### Spanish

In page 271 in the Spanish book represents the greatest common divisor as found in Bibliography.

#### French

On page 101 of Intro-math-discrètes, the notation and name of the gcd is described (goto page).

#### Finnish

On the Helsinki University of Technology, Department of Mathematics website, we find that they use *syt* instead of gcd, and it is called 'Suurin yhteinen tekijä' in Finnish context.

Also find *syt* in wekipedia. Usually at university level notation (*a,b*) is used for greatest common divisor of numbers *a* and *b* instead of letter combination *syt*. For example see Lecture notes by Pentti Haukkanen at University of Tampere.