Professor Dr. Reinhard Mennicken, born March 16, 1935, in Cologne passed away on Thursday, June 13, 2019, at the age of 84 years. He received his PhD in 1963 under the supervision of Professor Dr. Friedrich Wilhelm Schaefke and his Habilitation in 1968 at the University of Cologne. From 1971 until his retirement in 2000 he held a chair at the University of Regensburg and in between, in 1974/75, at the Technical University Braunschweig. As a mathematician his research focused on differential equations and spectral theory, with special emphasis on applications in engineering and physics.
Reinhard...