Abstract: | Summary The purpose of the present paper is to prove the following theorem: Let Ω be an oval in the projective plane P of odd order
n. If P admits a collineation group G wich maps Ω onto itself and is doubly transitive on Ω, then P is desarguesian, Ω is
a conic and G contains all collineations in the little projective group PSL(2, n) of P wich leaves Ω invariant.
Entrata in Redazione il 5 april 1977. |