“…The initial filter coefficient, , decreases 0 as increases, in accord with the corresponding predictions s Ž of previous work see, for instance, Tien and Payatakes, 1979;. Tien, 1989;Burganos et al, 1992aBurganos et al, , 1995 . Region 1 shrinks, region 2 shifts left, that is, to lower r⑀ values, while main-0 taining its breadth, and region 3 expands to the left.…”