Cooperation in the group „Stellar evolution and asteroseismology”.This includes the improvement of theoretical models for protostars and pre-main sequence stars with the aim to connect the models with asteroseismic methods and to study the early evolution of planets.Calculations of theoretical models of early stellar evolution with accretion and improvement of existing methods. Qualified cooperation on international research topics within the group. Preparatory work for the ESA-mission PLATO.Publication of own research results in international peer-reviewed journals. Presentations at international...