Bohdan Feshchenko

activity

20182021

collaborators

4 papers

math.GT2021

Deformations of circle-valued functions on $2$ -torus

Bohdan Feshchenko

In this paper we give an algebraic description of fundamental groups of orbits of circle-valued smooth functions from some subspace of the space of smooth functions with isolated s…

math.GT2019

Automorphisms of Kronrod-Reeb graphs of Morse functions on 2-torus

Anna Kravchenko, Bohdan Feshchenko

This paper is devoted to the study of special subgroups of the automorphism groups of Kronrod-Reeb graphs of a Morse functions on $2$ -torus $T^{2}$ which arise from the action of dif…

math.GT2019

Deformations of smooth functions on $2$ -torus

Bohdan Feshchenko

Let $f$ be a Morse function on a smooth compact surface $M$ and $S^{'} (f)$ be a group of $f$ -preserving diffeomorphisms of $M$ which are isotopic to the identity map. Let a…

math.AT2018

Deformations of smooth function on $2$ -torus whose KR-graph is a tree

Bohdan Feshchenko

Let $f : T^{2} \to R$ be Morse function on $2$ -torus $T^{2},$ and $O (f)$ be the orbit of $f$ with respect to the right action of the group of diffeomorphisms $\mathcal{…

Deformations of circle-valued functions on 2-torus

Automorphisms of Kronrod-Reeb graphs of Morse functions on 2-torus

Deformations of smooth functions on 2-torus

Deformations of smooth function on 2-torus whose KR-graph is a tree

Deformations of circle-valued functions on $2$ -torus

Deformations of smooth functions on $2$ -torus

Deformations of smooth function on $2$ -torus whose KR-graph is a tree