Operators and C 0 {\displaystyle C_{0}} -Semigroups, was supervised by RainerNagel [de]. From 2007 to 2010, Eisner worked as a scientific assistant at the
– Clare Kramer – Andy Hallett – Tim Brazeal – Alexandra Velten – Dr. RainerNagel – Hubert Zitt – Richard Arnold – Marc B. Lee – Robert Vogel FedCon XVI
Otto Nagel, VEB Verlag der Kunst, Dresden, 1959 Gerhard Pommeranz-Liedtke: Otto Nagel und Berlin, VEB Verlag der Kunst, Dresden, 1964 Bernd-Rainer Barth
One-Parameter Semigroups for Linear Evolution Equations, Klaus-Jochen Engel, RainerNagel (2000, ISBN 978-0-387-98463-6) Elementary Methods in Number Theory, Melvyn