3 papers
math.CO2022
A shadow Markov equation
Nathan Bonin, Valentin Ovsienko
We introduce a superanalogue of the classical Markov equation. This equation characterizes the ``shadow Markov numbers'' recently considered by one of us. We show that this equatio…
math.HO2020
On the 80th Birthday of Dmitry Borisovich Fuchs
Alice Fialowski, Ekaterina Fuchs, Elena Fuchs +6
This article is a collection of several memories for a special issue of SIGMA devoted to Dmitry Borisovich Fuchs.
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.