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which fulfills the incidence condition of Pascal's theorem or the 5-point degeneration of it, is a nondegenerate conic.
#If is an oval in a pappian projective plane and the group of projectivities which leave invariant is 3-transitive, i.e. for 2 triples of points there exists a projectivity with . In the finite case 2-transitive is sufficient.
# An oval in a pappian projective plane of characteristic is a conic if and only if for any point of a tangent there is an involutory perspectivity

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