Nonlinear Dynamics at the Free University Berlin

DFG Collaborative Research Center 910 on Control of self-organizing nonlinear systems

Research Project

Reaction-diffusion systems: hysteresis and nonlocal interactions

Principal Investigator
PD Dr. Pavel Gurevich

Dr. Nikita Begun (PostDoc): My main research interests include Dynamical systems, Differential equations, Reaction-diffusion equations, Hyperbolic attractors and systems with dry friction.

Mark Curran (PhD Student): I am interested in the well-posedness of reaction-diffusion equations with a nonlinear term involving spatially distributed hysteresis. In particular, I am dealing with this problem where the spatial domain is a subset of R^n with n greater than one.

Adem Güngör (Masters student-Student Assistant)

Eyal Ron(Former PhD Student):I am interested in delay differential equations and hysteresis operators. Research questions invole long-term behaviour, such as periodic solutions and patterns. Specifically, the question of controlling these phenomenon using delay terms (e.g. Pyragas control) or hysteresis operators is of great interest.

Konstantinos Zemas (Former masters student-Student Assistant)

Project Summary

The project deals with reaction-diffusion systems involving hysteresis, or, more generally, bistability. The models under consideration have applications to a large number of biological, chemical, physical, and economic processes. Besides the nontrivial issue of well-posedness, we are interested in the qualitative description of solutions. The analysis will be in terms of emerging spatio-temporal patterns that are influenced primarily by the interplay between diffusion and spatially distributed hysteresis. We will also develop theoretical concepts for the stability analysis and control of these patterns by temporally and spatially nonlocal feedback.

Preprints and Publications

Gurevich P., Tikhomirov S.
Spatially discrete reaction-diffusion equations with discontinuous hysteresis.
Gurevich P.
Asymptotics of parabolic Green's functions on lattices.
Gurevich P., Rachinskii D.
Asymptotics of sign-changing patterns in hysteretic systems with diffusive thresholds.
Gurevich P., Vaeth M.
Stability for semilinear parabolic problems in L_2, W_2^1, and interpolation spaces.
Friedman G., Gurevich P., McCarthy S., Rachinskii D.
Switching behaviour of two-phenotype bacteria in varying environment.
J. Physics: Conference Series. Vol. 585 (2015), 012012.
Zeitz M., Gurevich P., Stark H.
Feedback control of flow vorticity at low Reynolds numbers.
The European Physical Journal E (EPJE). Vol. 38:22 (2015).
Gurevich P., Rachinskii D.
Pattern formation in parabolic equations containing hysteresis with diffusive thresholds.
J. Math. Anal. Applications. Vol. 424 (2015), 1103-1124.
N. A. Begun and S. G. Kryzhevich
One-dimensional chaos in a system with dry friction: analytical approach
Meccanica. 2015. (pdf)
switch Last change: Jan. 5, 2017
This page strictly conforms to the XHTMLswitch1.0 standard and uses style sheets. Valid XHTML 1.0! Valid CSS!