Preface to the fourth edition

Preface to the fourth edition
In this fourth edition, we have made a number of minor improvements, added
some background material, and included more than two dozen new exercises. We
have also addressed many comments and suggestions we received from colleagues
and students during the past �ve years. It is a pleasure to thank Aurélien Alfonsi,
Martin Barbie, Nike Blessing, Mengyu Du, Sabina Gadzhieva, Nina Gantert, Adrian
Gorniak, Ria Grindel, Nils Hansen, Timo Hirscher, Marius Kaiser, Alexander Kalinin,
Thomas Knispel, Mourad Lazgham, Tobias Lutz, Simon Maurer, Heiko Preuß, Max von
Renesse, Uwe Schmock, Qun Wang, and Ilan Zlotin. Special thanks are due to Stefan
Gerhold. Finally, we thank our publisher De Gruyter for encouraging us to prepare a
fourth edition and for their helpful support.
September 2016
Hans Föllmer
Alexander Schied