During the of Fall 1991, The Centre de Recerca Matematica, a research
institute sponsored by the Institut d'Estudis Catalans, devoted a
quarter to the study of stochastic analysis. Prominent workers in this
field visited the Center from all over the world for periods ranging
from a few days to several weeks. To take advantage of the presence in
Barcelona of so many special- ists in stochastic analysis, we organized
a workshop on the subject in Sant Feliu de Guixols (Girona) that
provided an opportunity for them to ex- change information and ideas
about their current work. Topics discussed included: Analysis on the
Wiener space, Anticipating Stochastic Calculus and its Applications,
Correlation Inequalities, Stochastic Flows, Reflected Semimartingales,
and others. This volume contains a refereed selection of contributions
from some of the participants in this workshop. We are deeply indebted
to the authors of the articles for these exposi- tions of their valuable
research contributions. We also would like to thank all the referees for
their helpful advice in making the volume a reflection of the dynamic
interchange that characterized the workshop. The success of the Seminar
was due essentially to the enthusiasm and stimulating discus- sions of
all the participants in an informal and pleasant atmosphere. To all of
them our warm gratitude.