Pebbling and Bandwith

It is shown that a graph with n vertices and bandwidth k requires at most min(2k2+k+1,2klogn) pebbles. Furthermore, the pebble problem restricted to and/or graphs of bandwidth f(n) is in INSPACE( f(n)×log2n) and is log space hard for the class INTISP(poly,f(n)). ( INTISP(poly,f(n)) denotes the class of sets accepted by nondeterministic Turing machines in polynomial time and simultaneous f(n) space. )