Obituary Prof. Dr. Armin LechleiterProf. Armin Lechleiter passed away on January 28, 2018 at the young age of 35. We mourn the loss of a highly esteemed colleague and internationally renowned scientist.
Armin Lechleiter was born on May 15, 1982 in Friedrichshafen. From 2001 - 2003 and 2004 - 2006 he studied Mathematics with a minor in Computer Science in Karlsruhe (Diplom with distinction, 2006). In between, he spent a year in Lyon, in which he earned a Bachelor (Licence) in Mathematics at the ENS Lyon.
Also in Karlsruhe, Armin Lechleiter wrote his dissertation under the supervision of Prof. Dr. A. Kirsch with the title "Factorization Methods for Phototonics and Rough Surfaces." Shortly thereafter he was awarded the second prize of the Leslie Fox Prize Competition by the British Institute of Mathematics and its Applications for his research. In 2008, he moved to Paris, where he worked for over three years at the École Polytechnique – first as a postdoc and then as a permanent researcher. In this time he continued his research on analytical studies of scattering problems and extended these adding new emphases of theoretical and practical aspects of parameter identification with partial differential equations.
His international recognition as one of the leading young scientists in the area of inverse problems secured him a position as a Junior Professor at the University of Bremen at the age of 29. After further offers from other universities, Armin Lechleiter was appointed W2-professor at the Center for Industrial Mathematics of the Mathematics / Computer Science Department, Bremen in 2011 and his appointment for a W3-professorship had already been agreed upon for 2017.
The years in Bremen were very productive, despite the already diagnosed illness. Armin Lechleiter developed a theory for analyzing locally disturbed scattering problems and published on topics of numerical methods of integral calculations as well as scattering problems with additional sparsity constraints.
The supervision and support of his students and doctoral students was a very important concern for him. One highlight were the summer schools he organized together with Prof. Houssem Haddar, École Polytechnique, in which his students, together with doctoral students and postdocs, particularly from France and the Maghreb-States, had the opportunity to learn from the world's leading researchers in their field.
With his continually growing research group, Armin Lechleiter was involved in numerous scientific collaborations. Of particular mention is his instrumental role in the establishment of the Research Training Group RTG 2224 "π3 Parameter Identification."
Armin Lechleiter was an extraordinarily talented and passionate mathematician, but beyond that had an extremely broad range of interests. Those of us who were able to participate in his memorial service in Lilienthal got to experience how intensely Armin had, within a short period of time, been involved in his new community and especially in the musical life and the church congregation St. Marien. Armin Lechleiter is survived by his wife Marion and his daughter Sarah. We extend our deepest sympathies to them.
His kind, intelligent and caring personality is painfully missed; we will remember him with gratitude.
His colleagues from Bremen