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Alex Eskin

Alex Eskin (Russian: Александр Григорьевич Эскин, born May 19, 1965, Moscow, USSR^[1]) is an American mathematician. He is the Arthur Holly Compton Distinguished Service Professor in the Department of Mathematics at the University of Chicago.^[2] His research focuses on rational billiards and geometric group theory.

Eskin was born in Moscow on May 19, 1965.^[1][2][3] He is the son of a Russian-Jewish mathematician Gregory I. Eskin (b. 1936, Kiev), a professor at the University of California, Los Angeles. The family emigrated to Israel in 1974 and in 1982 to the United States.^{[citation needed]}

Eskin earned his doctorate from Princeton University in 1993, under the supervision of Peter Sarnak.^[4]

Eskin has been a professor at the University of Chicago since 1999.^[5]

Eskin gave invited talks at the International Congress of Mathematicians in Berlin in 1998,^[6] and in Hyderabad in 2010.^[7]

For his contribution to joint work with David Fisher and Kevin Whyte establishing the quasi-isometric rigidity of solvable groups, Eskin was awarded the 2007 Clay Research Award.^[8] In 2012, he became a fellow of the American Mathematical Society.^[9] In April 2015, Eskin was elected a member of the United States National Academy of Sciences.^[5][10] Eskin won the 2020 Breakthrough Prize^[11][12] in mathematics for his classification of ${\displaystyle P}$-invariant and stationary measures for the moduli of translation surfaces,^[13] in joint work with Maryam Mirzakhani.

• Alex Eskin; Curt McMullen (1993). "Mixing, counting, and equidistribution in Lie groups". Duke Mathematical Journal. 71 (1): 181–209. CiteSeerX 10.1.1.39.8202. doi:10.1215/S0012-7094-93-07108-6. S2CID 611397.
• Alex Eskin; David Fisher; Kevin Whyte (2012). "Coarse differentiation of quasi-isometries I: Spaces not quasi-isometric to Cayley graphs" (PDF). Annals of Mathematics. 176 (1): 221–260. doi:10.4007/annals.2012.176.1.3. S2CID 8793786.
• Alex Eskin; Maryam Mirzakhani; Amir Mohammadi (2015). "Isolation, equidistribution, and orbit closures for the ${\displaystyle {\text{SL}}(2,\mathbb {R} )}$ action on moduli space". Annals of Mathematics. 182 (2): 673–721. arXiv:1305.3015. doi:10.4007/annals.2015.182.2.7. S2CID 8229920.
• Alex Eskin; Maryam Mirzakhani (June 7, 2018). "Invariant and stationary measures for the action on Moduli space". Publications Mathématiques de l'IHÉS. 127 (1): 95–324. arXiv:1302.3320. doi:10.1007/s10240-018-0099-2. S2CID 119906170.

• Website at University of Chicago
• Paper about measure classification, joint with Maryam Mirzakhani