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COMBINATORICS
2006
13 years 10 months ago
2006
For n a positive integer, we show that the number of of 2n-tuples of integers that are the row and column sums of some n
DCG
2006
13 years 10 months ago
2006
We use circular sequences to give an improved lower bound on the minimum number of ( k)
JCT
2008
13 years 10 months ago
2008
Let G be a regular graph and H a subgraph on the same vertex set. We give surprisingly compact formulas for the number of copies of H one expects to find in a random subgraph of G...
CORR
2007
Springer
13 years 10 months ago
2007
Springer
—Real number calculations on elementary functions are remarkably difficult to handle in mechanical proofs. In this paper, we show how these calculations can be performed within a...
JGT
2006
13 years 10 months ago
2006
Jeager et al introduced a concept of group connectivity as an generalization of nowhere zero flows and its dual concept group coloring, and conjectured that every 5-edge connected...