# Albert Girard

> Albert Girard was a French-born mathematician. He studied at the University of Leiden. He "had early thoughts on the fundamental theorem of algebra" and gave the inductive definition for the Fibonacci numbers.
He was the first to use the abbreviations 'sin', 'cos' and 'tan' for the trigonometric functions in a treatise. Girard was the first to state, in 1625, that each prime of the form 1 mod 4 is the sum of two squares. It was said that he was quiet-natured and, unlike most mathematicians, did not keep a journal for his personal life.

*French mathematician (1595-1632)*

**Canonical URL:** https://fame.am/person/albert-girard

## Identity
- **Profile type:** Academic ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Academics
- **Country:** Netherlands
- **Born:** 1595-10-11
- **Died:** 1632-12-08
- **Status:** deceased
- **Gender:** male

## Fame
- **Popularity score:** 48.6 / 100
- **Momentum:** 0.0 / 100  (trend: STABLE)
- **Historical depth:** 18.2 / 100
- **Attention shift:** 0.0 / 100
- **Source confidence:** 60.0 / 100
- **Profile completeness:** 70.0 / 100

## Sources
- [Wikiquote](https://uk.wikiquote.org/wiki/%D0%90%D0%BB%D1%8C%D0%B1%D0%B5%D1%80_%D0%96%D0%B8%D1%80%D0%B0%D1%80)
- [ألبير جيرار](https://ar.wikipedia.org/wiki/%D8%A3%D9%84%D8%A8%D9%8A%D8%B1_%D8%AC%D9%8A%D8%B1%D8%A7%D8%B1)
- [البرت جيرارد (رياضياتى)](https://arz.wikipedia.org/wiki/%D8%A7%D9%84%D8%A8%D8%B1%D8%AA_%D8%AC%D9%8A%D8%B1%D8%A7%D8%B1%D8%AF_(%D8%B1%D9%8A%D8%A7%D8%B6%D9%8A%D8%A7%D8%AA%D9%89))
- [Alber Jirar](https://az.wikipedia.org/wiki/Alber_Jirar)
- [Albert Girard](https://ca.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://de.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://en.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://es.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://fr.wikipedia.org/wiki/Albert_Girard)
- [אלבר ז'יראר](https://he.wikipedia.org/wiki/%D7%90%D7%9C%D7%91%D7%A8_%D7%96'%D7%99%D7%A8%D7%90%D7%A8)
- [Albert Girard](https://ht.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://it.wikipedia.org/wiki/Albert_Girard)
- [알버트 지라드](https://ko.wikipedia.org/wiki/%EC%95%8C%EB%B2%84%ED%8A%B8_%EC%A7%80%EB%9D%BC%EB%93%9C)
- [Albert Girard](https://nl.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://pl.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://pms.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://pt.wikipedia.org/wiki/Albert_Girard)
- [Albert Girard](https://ro.wikipedia.org/wiki/Albert_Girard)
- [Жирар, Альбер](https://ru.wikipedia.org/wiki/%D0%96%D0%B8%D1%80%D0%B0%D1%80%2C_%D0%90%D0%BB%D1%8C%D0%B1%D0%B5%D1%80)
- [Albert Girard](https://sv.wikipedia.org/wiki/Albert_Girard)
- [Альбер Жирар](https://uk.wikipedia.org/wiki/%D0%90%D0%BB%D1%8C%D0%B1%D0%B5%D1%80_%D0%96%D0%B8%D1%80%D0%B0%D1%80)
- [Wikiquote](https://ru.wikiquote.org/wiki/%D0%90%D0%BB%D1%8C%D0%B1%D0%B5%D1%80%D1%82_%D0%96%D0%B8%D1%80%D0%B0%D1%80)
- [Wikidata](https://www.wikidata.org/wiki/Q548301)

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