Thursday, October 25, 2018 
Hannes Stuke (FU Berlin) 
A dynamical systems approach to outlier robust machine learning 
We deal with a supervised learning in which we want to fit probability distributions of
observed data by artificial neural networks. We introduce the socalled gradient conjugate prior (GCP) update and the induced dynamical system.
We will explain the dynamics of the parameters and show how one can use insights from the dynamical behavior to recover the ground truth distribution in a way
that is more robust against outliers.
This is joint work with Pavel Gurevich.

Thursday, November 1st, 2018 
Nicola Vassena (FU Berlin) 
A report from outside world  are we on a shared path or on a lonely path?

Thursday, November 8th, 2018 
Si Mohamed Sah (Technical University of Denmark) 
Infinite limit cycle bifurcation in a delayed differential equation 
We investigate the occurrence of a bifurcation, which we term the ``infinite limit cycle bifurcation", or ILCB for short,
in a second order nonlinear DDE (delaydifferential equation). When the delay time T>0, no matter how small, an infinite number of limit cycles (LCs) exist,
their amplitude going to infinity as T goes to zero. Perturbation methods are used to approximate the system and investigate the nature of such a bifurcation.

Thursday, November 15th, 2018 
Maximilian Bee and Hauke Sprink (FU Berlin) 
The ζfunction

Nicola Vassena (FU Berlin) 
A divulgative talk on chemical reaction networks

Thursday, November 22nd , 2018 
Nicola Vassena 
Bad Children and Good Children 
This talk can be regarded as a linear algebra one. It is focused on characterization of determinant value for a specific class of matrices. However, this result has strong repercussion in chemical reaction networks,
and specifically on the identification of "bad" child selections, possibly responsible for sign changes in the Jacobian of the system and consequent dynamical implications.

Thursday, November 29th , 2018 
Ignacio González Betegon (Freie Universität Berlin) 
Exploring genericity results in inverse problems on coupled cell networks 
In a system of ODE's, inverse problems guarantee some behaviour in the hole system by just studying one of the equations.
In this talk we will introduce some symmetry condition to our system of ODE's and we will see how genericity results on inverse problems behave. 
Nicola Vassena (FU Berlin) 
Bad children and good children 
For last 30 minutes, I will make some concluding remarks regarding the bipartite graph analysis of my last week's talk. 
Thursday, December 6th , 2018 
Nicola Vassena (Freie Universität Berlin) 
Bad children and good children 
Duro a morire, in the first 30 minutes, I will make some concluding remarks regarding the bipartite graph analysis of my talk from two weeks ago. 
Alejandro López Nieto (Freie Universität Berlin) 
The ChafeeInfante attractor in delay equations 
In the talk I will present a series of techniques for the study of the global attractor of a delay differential equation.
The main tool is a zero dropping lemma for a class of cyclic monotone feedback systems that endows the studied equation with a PoincaréBendixson property, this will allow us to build a (still small)
basis for the systematic construction of global attractors. The talk is rather selfcontained, no specific understanding of delay equations is required.

Thursday, December 13th 
Alejandro López Nieto 
The ChafeeInfante attractor in delay equations 
In the talk I will present a series of techniques for the study of the global attractor of a delay differential equation.
The main tool is a zero dropping lemma for a class of cyclic monotone feedback systems that endows the studied equation with a PoincaréBendixson property, this will allow us to build a (still small)
basis for the systematic construction of global attractors. The talk is rather selfcontained, no specific understanding of delay equations is required.

Thursday, January 10th 
Babette de Wolff (Freie Universität Berlin) 
Nonlinear control for planar systems with rotational symmetry 
In this talk, we study time delayed feedback control for planar systems with rotational symmetry. Whereas in the classical Pyragas control scheme the control term is chosen to be linear, we now also allow for nonlinear control terms.
We discuss different classes of noninvasiveness of the control scheme and study how these can help us to overcome obstructions to the success of the control scheme.

Thursday, January 17th 
Isabelle Schneider (Freie Universität Berlin) 
An introduction to statedependent delay equations 
Thursday, February 7th 
Yuya Tokuta (Freie Universität Berlin) 
Euglena bioconvection 
Parabolic equations appear in models of biological systems. Among such, reactiondiffusion equations are known to exhibit macroscopic patterns.
In particular, we will cover a reactiondiffusion system with conservation of mass as a model of Euglena bioconvection under stationary or oscillatory illumination.
We will discuss Turing instability of the system, depending on the illumination settings, and interpret the result.

Thursday, February 14th , 2019 
Maximilian Bee (Freie Universität Berlin) 
Catastrophic development  an application of the cusp model to psychology 
Ignacio González Betegon (Freie Universität Berlin) 
Exploring the boundaries of genericity on inverse problems in coupled cell networks 
Ismail Yenilmez (Freie Universität Berlin) 
The Dynamics of Keen’s Model 