Alexander Mielke

Pierre-Étienne Druet, Thomas Eiter, Annegret Glitzky, Martin Heida, Katharina Hopf, Hans-Christoph Kaiser, Thomas Koprucki, Matthias Liero, Anieza Maltsi, Oliver Marquardt, Grigor Nika, Joachim Rehberg, Stefanie Schindler, Artur Stephan

Andrea Eismann

Honorary Members:
Konrad Gröger, Jürgen Sprekels

We mourn the loss of Professor Konrad Gröger (10th April 1936 -- 14th September 2020). Konrad Gröger was a loyal friend to us, a caring and crucial scientific companion right to the end. We cherish him as an exemplary researcher and a contributor to scientific life at our institute, always committed to applications and always interested in achieving integration. Many of us will also fondly remember him as an inspiring and influential teacher.


We mourn the loss of Herbert Gajewski (13th June 1939 -- 11th December 2019), former head and honorary member of RG1.

Upcoming Events:
  • "Student Compact Course" (12th -- 23rd October 2020) within Thematic Einstein Semester, winter term 2020/21
  • AMaSiS 2021: Applied Mathematics and Simulation for Semiconductors, 6th -- 10th September 2021



    Many fundamental processes in nature and technology can be described by partial differential equations. The research group is working on the analytical theory of such equations (existence, uniqueness, qualitative behaviour) and on the development and implementation of algorithms for their numerical solution. The algorithms are used for the numerical simulation in industrial applications. The functionality of modern materials, for instance, relies on the complex interplay of effects on several length and time scales as well as on different physical effects, such as mechanics, thermodynamics, optics, and electromagnetism. The main topics of research are mathematical models of carrier transport in semiconductors and optoelectronic devices and reaction-diffusion equations for the transport of dopants in solids. Furthermore, nonlinear material models for linearized and nonlinear elasticity and plasticity as well as for systems with internal variables are under study. In this context, we develop in particular methods for abstract evolutionary equations, e.g. gradient systems, and for multiscale problems.


    On October 23rd 2019, the organisers of the Berliner Oberseminar "Nonlinear Partial Differential Equations" (Langenbach-Seminar) hosted a colloquium in honour of Prof. Dr. Herbert Gajewski's 80th birthday. Ansgar Jüngel (TU Vienna) gave a special lecture titled "Cross-diffusion systems: from spin semiconductors to biological populations with stochastic forcing", which touched on several of Herbert Gajewski's research fields. Prof. Dr. Herbert Gajewski held the offices of deputy director and acting director of the WIAS and was head of Research Group 1.




    Prof. Dr. Karen M. Gambaryan, head of the Semiconductor and Microelectronics Dept. at Yerevan State University, Armenia, has been visiting our institute for the months of July and August 2019. During his visit which was funded via an award by the German Academic Exchange Service (DAAD), Karen was introduced to the software library Sphinx and has performed systematic simulations of InAsSbP quantum dots that resemble the realistic systems obtained in his lab using liquid phase epitaxy (LPE).



    Several members of RG1 and the Weierstrass Group participated in the "International Congress on Industrial and Applied Mathematics"(15th --19th July 2010, Valencia, Spain).


    After Mr. Thomas Frenzel's PhD thesis defense (”On the derivation of effective gradient systems via EDP-convergence") on 26th June, 2019.


    On 31st January and 1st February 2019, the kickoff meeting of the ECMI Special Interest Group "Modelling, Simulation and Optimization in Electrical Engineering" took place at WIAS; the meeting was organized by Nella Rotundo (RG1), Patricio Farrell (RG3) and Dirk Peschka (Weierstrass Group).


    Within the framework of the workshop "Analysis of Evolutionary and Complex Systems", a colloquium in honor of Alexander Mielke's 60th birthday took place on 26th September 2018.


    On occasion of his 80th birthday, Prof. Dr. Konrad Gröger was awarded a Honorary Medal by the Czech Mathematical Society for his longlife contribution to cooperation between Czech and German mathematicians, see photos below.

    The junior prize of the International Society for the Interaction of Mechanics and Mathematics (ISIMM) 2018 was awarded to Matthias Liero. The recipient of the prize is to selected among the researchers who made significant contributions linking Mathematics and Mathematical Physics. Matthias Liero's research is focused on the mathematical analysis of partial differential equations, e.g. describing the electrothermal interplay in organic light-emitting diodes (OLEDs). He is already the second awardee of the ISIMM junior prize of our research group.