Riv. Mat. Univ. Parma (5) 6 (1997)

STEFANIA FERRI

ProprietÓ grafiche caratterizzanti le quadriche ellittiche di PG(3,q)

Received: February 20, 1997.
Classificazione AMS 51E20

Summary
We prove that a k-set K of PG(3,q) with k ≤ q2 + 1 of class [0, m, n,]1 with respect to the lines, such that at the most q+1 m-secant lines meet at each point of K, is a (q2+1)-cap and hence, if q is odd, is an elliptic quadric.


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