Classifications of Dulac maps and epsilon-neighborhoods
Activities and news
# The project is financed by the
Unity Through Knowledge Fund
established in 2007 by the Ministry of Science, Education and Sports on behalf of the government of the Republic of Croatia; approved within My First Collaboration Grant 2017.
# The leader:
Maja Resman
, University of Zagreb, Faculty of Science, Department of mathematics, Zagreb, Croatia
# The co-leader:
Pavao Mardešiæ
, University of Burgundy, Dijon, France
# The administering organization: University of Zagreb, Faculty of Science, Zagreb, Croatia
# The partner institution: Université de Bourgogne, Institut de Mathématiques de Bourgogne, Dijon, France
# The collaborators on the project: Jean-Philippe Rolin, University of Burgundy, Dijon, France; Vesna Županoviæ, University of Zagreb, Faculty of electrical engineering and computing and Sonja Štimac, University of Zagreb, Faculty of Science, Department of mathematics
# The budget of the project: 260 000 HRK from UKF, matching funding 52 000 HRK
# The duration of the project: 15 months (16/10/2017-15/01/2019)
The project summary
:
The project is a fundamental research project in mathematics aimed at applying mathematical analysis tools in understanding the qualitative behaviour of dynamical systems. The dynamical systems are mathematical models given as systems of differential equations whose solutions describe natural processes. Our motivation comes from bifurcation theory of dynamical systems. The most important question is the question of stability with respect to the parameters: can one predict how small changes in parameters will influence the long-term behaviour of solutions. Qualitative theory is concerned with describing the evolution of solutions in time without explicitly solving the equations. In particular, to understand bifurcations, one can measure the complexity of attractors of trajectories by the number of closed orbits they bifurcate into by parameter changes. Even in very specific and seemingly simple models in the plane, this question is open (the famous open Hilbert’s 16th problem). One-dimensional representation of a system close to an attractor is given by the function called the Poincaré map. The question of understanding bifurcations of systems is translated into question of understanding intrinsic properties of families of Poincaré maps. We study a special type of this function, the so-called Dulac map, which corresponds to attractors of saddle polycycle type. To understand this function more deeply, with collaborators from geometry and dynamical systems group at the Institut de Mathématiques de Bourgogne, Dijon, we would like to find a simple form to which it can be translated, at the same time requesting that the translation preserves properties of the original function. That is, as our final goal, we would like to describe the analytic class of Dulac maps, as one step toward understanding bifurcations of saddle polycycles. Dynamical systems are currently an important and quickly developing branch of mathematics in the world, with non-neglectable applications to technology. Given the fact that in Croatia there is only a small group of people working in the field, one aim of this project is to contribute to its propagation in Croatia and to its visibility among students and future scientists by three means: 1. Strengthening the leader and the whole group by means of new collaborations, through the proposed mobility program, 2. Organizing a Dynamical systems workshop and inviting foreign experts to give courses aimed at postgraduate / doctoral students and young researchers, 3. Equipping the Central mathematical library with modern books and textbooks in the field.
The main activities planned in the project are: the long-term stay of the leader at University of Burgundy for scientific collaboration (6 months in the first halfth of the project) and organization of the Workshop and conference on dynamical systems in Zagreb in the second halfth of the project.
More information can be found at
Unity Through Knowledge Fund page.