... a passant of P (cf. end of Section 5);4. all other adjacencies in G, apart from the 5-cycles within each of V0, ,V3, describeincidences.Proof. It suffices to indicate a proof of the first ... adjacent to X ∈F2if and only if v ∈ X.(3) Each coclique in Fi,i {1, 2}, contains 15 vertices of H, and each vertex of H iscontained in 15 cocliques of Fi.Proof. For (1), recall the definition ... Since eachparallel class of lines is a 5-cycle, there can be at most two elements of each class in acoclique. In particular, C must contain at least 5 points and at least 5 lines. the electronic...