This is Volume 3 of the Proceedings of the
International Summer School on
"Modular functions of one variable and
arithmetical applications"
which took place at RUCA, Antwerp University, from
July 17 to August 3, 1972.
It contains papers by P.Cartier-Y.Roy, B.Dwork, N.Katz,
J-P.Serre and H.P.F.Swinnerton-Dyer on congruence proper
ties of modular forms, £-adic representations, p-adic
modular forms and p-adic zeta functions.