This book consists of two sections. The first section (A) is dealing
with sets, capacities and measures of sets, giving elementary but deep
theorems about approximation of measures and capacities for instance by
compact sets. Besides concepts such as "paving capacity" and
"capacibility" several modern and quite new concepts such as
"capacitance", "mosaic", "envelope", and "scarper" ("rabotage") are
introduces in order to describe refinements of the structure of classes
of sets. Using these concepts the author proves in a new way know
theorems such as Choquet's theorem in abstract form and he also gives
new theorems for instance theorems about analytic sets.
The second section (B) presents a general theory of stochastic processes
but is mainly concerned with fundaments. It gives a far-reaching theory
of stopping times and q-fields belonging to stopping times and
classifications of stopping times and q-fields. This theory is then
applied to stochastic processes, particularly to processes with
realizations that are increasing functions. This book is well-fitted for
researchers, who need a thorough knowledge of stochastic processes. H.
Bergström.