activity
20002025
most citedObstructions to the existence of fold maps

8 citations · 41 across the 24 of their papers we have counts for

collaborators

30 papers

math.GT2025

On the number of components of folds of image simple fold maps

O. Saeki, R. Sadykov

A smooth map between manifolds is said to be \emph{image simple} if its restriction to its singular point set is a topological embedding. We study the parity of the number of conne…

math.GT2025

On the Mather stability theorem for smooth maps

Rustam Sadykov

In [MaII] Mather proved that a smooth proper infinitesimally stable map is stable. This result is the key component of the Mather stability theorem [MaV], which can be reformulated…

math.SG2024

Manturov Projection for Virtual Legendrian Knots in

Vladimir Chernov, Rustam Sadykov

Kauffman virtual knots are knots in thickened surfaces considered up to isotopy, stabilizations and destabilizations, and diffeomorphisms of induced by orie…

math.GT2024

Meander diagrams of virtual knots

Y. Belousov, V. Chernov, A. Malyutin +1

For classical knots, there is a concept of (semi)meander diagrams; in this short note we generalize this concept to virtual knots and prove that the classes of meander and semimean…

math.GT2023

Conjectures about virtual Legendrian knots and links

Vladimir Chernov, Rustam Sadykov

We formulate conjectures generalizing some known results to the category of virtual Legendrian knots. This includes statements relating virtual Legendrian knots to ordinary Legendr…

math.GT2022

The minimal number of critical points of a smooth function on a closed manifold and the ball category

Rustam Sadykov, Stanislav Trunov

Introduced by Seifert and Threlfall, cylindrical neighborhoods of isolated critical points of smooth functions is an essential tool in the Lusternik- Schnirelmann theory. We conjec…