V. V. Sharko
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Topological equivalence to a projection
MFAT 21 (2015), no. 1, 3-5
We present a necessary and sufficient condition for a continuous function on a plane to be topologically equivalent to a projection onto one of the coordinates.
About Kronrod-Reeb graph of a function on a manifold
MFAT 12 (2006), no. 4, 389-396
We study Kronrod-Reeb graphs of functions with isolated critical points on smooth manifolds. We prove that any finite graph, which satisfies the condition $\Im$ is a Kronrod-Reeb graph for some such function on some manifold. In this connection, monotone functions on graphs are investigated.
The $L^2$-invariants and flows on manifolds
MFAT 11 (2005), no. 2, 195-204
On classification of flows on manifolds. I
A. V. Bolsinov, A. A. Oshemkov, V. V. Sharko
MFAT 2 (1996), no. 2, 51-60
Bott functions and vector fields
MFAT 1 (1995), no. 1, 86-92