Sixth Framework Programme

Marie Curie Actions


EU Research Training Network CODY

Conformal Structures and Dynamics

Research Training Networks





Vacancy Details ESR position Barcelona (ref 10)

(see also the vacancy on the EU CORDIS webpage)

Core Project Title
Conformal Structures and Dynamics

€28625 per annum

Job Title
ESR position in Dynamical Systems
Job Description

The successful applicant is expected to work on one of the four problems given below and is supervised by Núria Fagella and the researcher in charge of the project the applicant selects.

1 -- Boundness of Siegel disks
Supervisor: Núria Fagella (with possible collaboration of Christian Henriksen, team 7)
We consider a 1-(complex)parameter family of entire transcendental maps with a persistent Siegel disk, one critical point and one asymptotic value. We propose a study of the parameter and dynamical planes to study the relationship between the boundness of the Siegel disk and the behaviour of the asymptotic value. This problem is related to the question of whether the Siegel disks of a.z.exp(z) are unbounded, for certain values of a.

2 --Dynamics of quasiperiodically forced maps in the complex plane
Supervisor: Joan Carles Tatjer
The object of this project is to study an intermediate case between the dynamics of maps in the complex plane and the dynamics in maps in spaces of complex dimension larger than one. The idea is to begin with simple cases, comparing with the known results in real dynamics, and with the corresponding systems without forcing. The role of the periodic points for the maps in the complex plane will be assumed by the closed invariant sets in the quasiperiodically forced maps. This means that the concept of reducibility of invariant circles will be relevant in this context.

3 -- Meromorphic functions with only one pole which is omitted
Supervisor: Xavier Jarque
This class of maps is, in the dynamical sense, in between entire and meromorphic functions. They share many properties with both of the above classes. We propose a sistematic study of this class of functions from the complex dynamics point of view.

4 -- A welding probleem
Supervisor: Joaquim Ortega-Cerdà
Recently Marshall and Rhode have proved the convergence of the so called zipper algorithm of numerical conformal mapping. The proposed project consists in the implementation of a small variant of the algorithm and an application of it to study a welding problem that arises when looking for drums D with a small inradius (symply connected domains wich contain no big disks) and low fundamental frequency (the first Dirichlet eigenvalue for the Laplacian in D). This domain should be a variant of the Goodman example as suggested in the work by Bañuelos and Carroll.

Contract Type
Early Stage Researcher (max. 4 years of research experience)
Number of Positions
31/05/2009 or until the position is filled
Start Date
as soon as possible
12 months
How to apply
Contact Person

Prof Nuria Fagella
Home Page:

Place Of Work
Organisation City Country
University of Barcelona Barcelona Spain
Mathematics:   Geometry, Mathematical analysis