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19952023
most citedOpen Problems, Questions, and Challenges in Finite-Dimensional Integrable Systems

47 citations · 313 across the 74 of their papers we have counts for

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dg-ga1995

Sturm theory, Ghys theorem on zeroes of the Schwarzian derivative and flattening of Legendrian curves

V. Ovsienko, S. Tabachnikov

We discuss Ghys' theorem on 4 zeroes of the Schwarzian derivative and its relation with flattening points of Legendrian curves and Sturm theory.