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This includes partial differential equations of elliptic and parabolic types
on Riemannian manifolds,
analysis and random walks on graphs, function theory and Markov processes on fractal spaces, etc.
The main direction of my research
is investigation of the global properties of solutions to elliptic
and
parabolic equations in connection with the geometry "in the large" of
the underlying space.
Here are some examples of such properties: heat kernel
estimates, Liouville properties,
recurrence and non-explosion of the heat
semigroup, estimates of the eigenvalues of the
and Schrödinger operators on various spaces, long time behavior of random walks and diffusions,
etc.