Houston, P.J. 1978-80 Scholar Born 1954 Co. Louth, Ireland. Ph.D. 1979 N.U.I. Appointments: Visiting Scientist, I.H.E.S. 1980-81; Scientific Associate, C.E.R.N. 1981-82; Chercheur Associe, I.P.N. 1982-83; Post Doc. Fellow, T.C.D. 1983-84; Lect., D.I.T. 1984-. Address: Department of Mathematics, Dublin Institute of Technology, Bolton Street, Dublin 1. E-mail: houston_at_stp.dias.ie