Micha Perles
Israeli mathematician · Israel · On the map · Academics · Born 1936 · age 90
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.
Micha Perles is read about 5 times a day, in 6 languages.
A typical day, 30 days to 21 September 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
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About this person
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.
