# Micha Perles

> Micha Asher Perles is an Israeli mathematician working in geometry, a professor emeritus at the Hebrew University. He earned his Ph.D. in 1964 from the Hebrew University, under the supervision of Branko Grünbaum.
His contributions include:The Perles configuration, a set of nine points in the Euclidean plane whose collinearities can be realized only by using irrational numbers as coordinates. Perles used this configuration to prove the existence of irrational polytopes in higher dimensions.
The Perles–Sauer–Shelah lemma, a result in extremal set theory whose proof was credited to Perles by Saharon Shelah.
The pumping lemma for context-free languages, a widely used method for proving that a language is not context-free that Perles discovered with Yehoshua Bar-Hillel and Eli Shamir.

*Israeli mathematician*

**Canonical URL:** https://fame.am/person/micha-perles

## Identity
- **Profile type:** Academic ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Academics
- **Country:** Israel
- **Born:** 1936
- **Status:** living
- **Gender:** male

## Bio

Imported from discovery source: wikidata-dump

## Fame
- **Popularity score:** 43.0 / 100
- **Momentum:** 4.7 / 100  (trend: STABLE)
- **Historical depth:** 5.7 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 35.0 / 100
- **Profile completeness:** 55.0 / 100

## Sources
- [Micha Perles](https://en.wikipedia.org/wiki/Micha_Perles)
- [ميشا بيرلز](https://arz.wikipedia.org/wiki/%D9%85%D9%8A%D8%B4%D8%A7_%D8%A8%D9%8A%D8%B1%D9%84%D8%B2)
- [Micha Perles](https://de.wikipedia.org/wiki/Micha_Perles)
- [Micha Perles](https://pt.wikipedia.org/wiki/Micha_Perles)
- [Micha Perles](https://fr.wikipedia.org/wiki/Micha_Perles)
- [מיכה פרלס](https://he.wikipedia.org/wiki/%D7%9E%D7%99%D7%9B%D7%94_%D7%A4%D7%A8%D7%9C%D7%A1)
- [Wikidata](https://www.wikidata.org/wiki/Q4189617)

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