  Regular variation is a continuous-parameter theory; we work in a general
setting, containing the existing Karamata, Bojanic-Karamata/de Haan and
Beurling theories as special cases. We give sequential versions of the main
theorems, that is, with sequential rather than continuous limits. This extends
the main result, a theorem of Kendall's (which builds on earlier work of
Kingman and Croft), to the general setting.
