Sep 28, 2010 
Dmitry Glazkov (University of Yaroslavl, Russia) 
Qualitative analysis of one class of optoelectronic systems
with singularly perturbed models 
1:00 p.m.,
WIAS, Mohrenstraße 39, 10117 Berlin, ErhardSchmidtHörsaal 
Oct 05, 2010 
Dmitry Glazkov (University of Yaroslavl, Russia) 
Local dynamics of delay differential equations
with long delay feedback 
Oct 19, 2010 
First
GermanRussian Interdisciplinary Workshop on the Structure and Dynamics of Matter,
BESSY, AlbertEinsteinStraße 15, 12489 Berlin
(Program) 
Oct 26, 2010 
SFB 647 
Nov 2, 2010 
Carlos Rocha (Instituto Superior Tecnico, Lisbon, Portugal) 
Transversality in scalar reactiondiffusion equations on a circle 
Stable and unstable manifolds of hyperbolic periodic orbits
for scalar reactiondiffusion equations defined on a circle always
intersect transversally. Moreover, hyperbolic periodic orbits do not
possess homoclinic orbit connections. We review these results that as
main tool use Matano's zero number theory dealing with the Sturm nodal
properties of the solutions.

Nov 9, 2010 
Flavio Abdenur (PUC, Rio de Janeiro) 
Geometric mechanisms for robust transitivity 
A diffeomorphism is said to be robustly transitive if it
is transitive, and moreover it is, err, robustly so. (Meaning of
course all diffeomorphisms sufficiently close to it are also
transitive.) Robustly transitive (but nonAnosov) systems are in a
sense a model for nonhyperbolic but hyperboliclike global behavior.
Though many examples have been constructed, and many consequences
deduced, the general mechanism(s) that underlie this phenomenon are
still poorly understood. I will report on some progress  meaning
actual theorems, not just lemmas or tentative ideas  that has been
recently achieved in this direction, in the context of partially
hyperbolic systems. The exciting keywords here are blenders,
minimality of foliations, and the crossing condition.
This is a joint (and ongoing) work with Sylvain Crovisier.

Ilya Kashchenko (University of Yaroslavl, Russia) 
Dynamics properties of secondorder equations with large delay 
(abstract as PDF document)

Nov 16, 2010 
SFB 647 
Nov 23, 2010 
Roman Shamin
(Peoples' Friendship University of Russia,
Shirshov Institute of Oceanology) 
Probability of the occurrence of freak waves 
Hydrodynamics of ideal heavy liquid with a free surface in
conformal variables is studied. In numeric simulations we show
occurrence of freak waves. The statistics of the occurrence of freak
waves is investigated. The characteristics of freak waves are considered.

Nov 30, 2010 
SFB 647 
Dec 7, 2010 
Martin Väth (Free University Berlin) 
Bifurcation for a ReactionDiffusion System with Obstacles and Pure Neumann Boundary Conditions 
Start at 4:15 p.m., coffee at 3:45 p.m., usual place, see below. 
Consider a reactiondiffusion system which is subject to
Turing's effect of diffusiondriven instability (leading
to patterns). It is known that the presence
of obstacles can lead to bifurcation of stationary solutions
in a parameter domain where the system is stable (thus
amplifying Turing's effect in a sense). However, usually
additional Dirichlet conditions were supposed.
For almost 30 years it has been an open problem whether the
same result holds without Dirichlet conditions.
In the talk the somewhat surprising answer is given, and
the difficulties of the proof are sketched.

Dec 14, 2010 
SFB 647 
Jan 11, 2011 
SFB 647 
Jan 18, 2011 
Stefan Liebscher (Free University Berlin) 
Bifurcation without parameters 
Jan 25, 2011 
Alexander Skubachevskii (Peoples' Friendship University of Russia) 
Damping Problem for Control System with Delay and Nonlocal Boundary Value Problems 
We consider damping problem for control system with delay. For the first
time this problem was studied by N.N. Krasovskii in 1968 for delay
differential equation. We consider the damping problem in general case,
i.e. for neutral differential difference equation. Such problem can be
formulated as a variational problem for nonlocal functional containing
derivatives and shifts for unknown function. We reduce a variational
problem to a boundary value problem for a second order neutral
differentialdifference equation and prove a uniqueness and existence of
generalized solution of this boundary value problem. Using a connection
between boundary value problem for differentialdifference equations
and nonlocal boundary value problems we obtain the necessary and
sufficient conditions for smoothness of generalized solutions.

Feb 1, 2011 
SFB 647 