## Combinatorics |

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### Contents

Self conjugate Tetrahedra with Respect to the Hermitian Variety x+xl | 27 |

Multipartitions and Multipermutations | 39 |

Simplicial Geometries | 71 |

Copyright | |

13 other sections not shown

### Common terms and phrases

abelian group algebraic Amer American Mathematical Society association scheme asymptotic BIBD bound circuits coefficients cofinitary columns combinatorial computing congruence subgroups conjecture conjugate consider construction Corollary corresponding cut-set defined definition denote disjoint dual edge elements equation equivalent Erdos exactly example exists external points finitary finitary matroid formula function geometry given graded graph greedy algorithm Hecke operators Hence homeomorphism inclusion graph incomplete block designs infinite directed paths integers J. J. Sylvester Kirkman design l)-resolvable Lemma matrix matroid maximal modular group nonnegative number of partitions obtain orbits orthogonal array P1 and P2 pairs parallel classes permutation group permutations polar plane polynomial problem Proc proved pseudoline pseudoplane pseudopoints Pu P2 R. C. Bose Rado Ramsey's theorem relations result rooted planar maps satisfying secant plane second associates selfconjugate semigroup sequence set of integers solutions subset diagram tetrahedron values vector vertex vertices