... Apostol (Springer-Verlag, Berlin, 1976) and K. Chandrasekharan (Springer-Verlag, Berlin, 1968), both with the title Intro- duction to analytic number theory;. see also Chandrasekharan's ... that aa&apos ;- 1 (mod p). Further, if a = a& apos; then a2 =l (mod p) whence a = 1 or a = p-1. Thus the set 2,3, . . . , p- 2 can be divided into b( p-3) pairs a, a& apos; with aa'= ... PL-3, 9;-I =am~ ;-~ +q' ,-3 * But we have pj/qj = ao+ Q ;-~ /P ;-~ , whence ~,=ao~;-l+9 ;-1 ,9j= pL1. Thus, on taking j = m, we obtain P, =arn(ao PA-,+ qk-d+ao ~ 6-3 +& ;-3 , qm = am...