Titlebook: Higher Combinatorics; Proceedings of the N Martin Aigner Conference proceedings 1977 D. Reidel Publishing Company, Dordrecht 1977 Combinato

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Combinatorics of Partial Geometries and Generalized QuadranglesA finite partial geometry [17] is an incidence structure S=(P,B,I), with a symmetric incidence relation satisfying the following axioms

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Edge Decompositions of Colored GraphsLet . be a class of directed loopless graphs whose edges have been colored with c colors. By Δ. (λ. ,…, λ.) we denote the digraph with v vertices any two of which are joined by λ. edges (in both directions) of color i.

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https://doi.org/10.1007/978-94-010-1220-1Combinatorics; Lattice; Partition; Permutation; graphs

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Ovals from the Point of View of Coding Theorynts no three of which are collinear. We split the discussion into three cases: Case 1 is that of a projective plane of even order congruent to 2 modulo 4. Case 2 is that of a projective plane of even order congruent to 0 modulo 4. Case 3 is that of a projective plane of odd order.

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