a1 Department of Mathematics Imperial College London SW7 2BZ United Kingdom
a2 Department of Mathematics University of Western Australia Nedlands WA 6009, Australia
a3 addr-lineDepartment of Pure Mathematics and Mathematical Statistics University of Cambridge Cambridge CB2 1SB United Kingdom
We give a self-contained proof of the O'Nan-Scott Theorem for finite primitive permutation groups.
(Received August 30 1985)
(Revised October 02 1986)
1980 Mathematics subject classification (Amer. Math. Soc.)