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.
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Entrata in Redazione il 5 april 1977.
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Korchmáros, G. Una proprietà gruppale delle involuzioni planari che mutano in sé un'ovale di un piano proiettivo finito. Annali di Matematica 116, 189–205 (1978). https://doi.org/10.1007/BF02413875
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DOI: https://doi.org/10.1007/BF02413875