  Necessary and sufficient criteria for metric subregularity (or calmness) of
set-valued mappings between general metric or Banach spaces are treated in the
framework of the theory of error bounds for a special family of extended
real-valued functions of two variables. A classification scheme for the general
error bound and metric subregularity criteria is presented. The criteria are
formulated in terms of several kinds of primal and subdifferential slopes.
