Titlebook: Combinatorial Mathematics; Proceedings of the I D. A. Holton,Jennifer Seberry Conference proceedings 1978 Springer-Verlag Berlin Heidelberg

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Cabg318

Recent progress and unsolved problems in dominance theory,A survey of (unsolved) combinatorial, algebraic and statistical problems which have arisen since 1950 and are closely related to dominance or majorization.

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JUST

Flat-Feet

Decompositions of complete symmetric digraphs into the four oriented quadrilaterals,We provide necessary and sufficient conditions for the existence of a decomposition of the set of arcs of a complete symmetric digraph into each of the four oriented quadrilaterals.

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Daily-Value

Mawkish

Soňa Nevšímalová,Oliviero Bruni index c(G) of G is the minimum of the index [A(X) : L.] taken over all Cayley graphs X of G. The present article is expository, reporting what is known to date about Cayley indices of groups and where some of the results may be found. The general pattern thus far indicates that, with finitely many

fledged

Soňa Nevšímalová MD, DSc,Oliviero Bruni MDth end points labelled 1 and n has no cycle. Let s. and t. denote the numbers of simple graceful graphs and graceful trees on n vertices respectively. Then t.≦s.≦p(A.) where p(A.) is the permanent (plus determinant) of the (n-2)×(n-2) matrix A.=(a.) defined by: . More specifically, let c. denote the

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