Eberhard Zeidler worked on nonlinear functional analysis and was the director of the Max Planck Institute for Mathematics in the Natural Sciences in Leipzig, Germany.
Zeidler is authoring a textbook series on quantum field theory:
Quantum field theory. A bridge between mathematicians and physicists Springer (2009) (web)
I: Basics in mathematics and physics. (ZMATH entry),
II: Quantum electrodynamics (ZMATH entry)