From the Editor

Mathematica Applicanda is very pleased to present Volume 44(1). This volume focuses on a special topic in Probability Theory, namely on the Theory and Applications of Optimal Stopping. The journal Mathematica Applicanda is for several reasons a natural place for this subject. Our longtime editor Prof. Bartoszyński was much interested in problems of Optimal Stopping and helped to  make such problems  known among distinguished Polish mathematicians. And, as many publications clearly indicate, this had a considerable influence among Polish peers.The interest in this subject was  again exemplified by the events in  Krakow in July 2012. Krakow then organized the 6th European Congress of Mathematics (6th ECM +STS) in which  Optimal Stopping and Applications was the leading theme of a mini-symposium as well as of  two Satellite Thematic sessions. Many important achievements were presented during these sessions.