This is page
Printer Opaque this
Time Hardware and Uniformity
David Mix Barrington
Neil Immerman
ABSTRACT We describ e three orthogonal complexity measures parallel
time amount of hardware and degree of non uniformity which together
parametrize most complexity classes Weshow that the descriptive com
plexity framework neatly captures these measures using three parameters
quanti er depth number of variables and typ e of numeric predicates re