Interacting Binaries in Globular Clusters: Evolution on Long Timescales
         Ralph A.M.J. Wijers
         Institute of Astronomy, Cambridge

Some elementary principles of the evolution of close binaries stars and
mass transfer in them are reviewed, and the formation and evolution of the
predominant types of binary star and compact object that occur in globular
clusters is discussed. Some emphasis is given to highlighting which phases
of stellar evolution and which types of object are more and less
understood.
   The influence of high stellar densities and the resulting encounters
on the evolution of binaries can take different forms. Firstly,
the formation rate of certain binaries may be increased without changing
the evolution and final outcome relative to similar binaries that were
primordial, as is the case with X-ray binaries. Secondly, processes such as
binary hardeing may systematically change the properties of a type of
object. An example of this are CVs: their progenitors have hardened,
causing lower average WD masses and possibly lower spiral-in survival
probabilities, hence lower formation rates. Thirdly, encounters may lead
to some types of object unique to globular clusters, of which some examples
are discussed.