86 search results - page 4 / 18 » Combinatorics of generalized q-Euler numbers |
87
Voted
COMBINATORICS
2006
14 years 11 months ago
2006
Previous work has shown the perhaps surprising result that, for any binary phylogenetic tree T , there is a set of four characters that define T . Here we deal with the general ca...
COMBINATORICS
2007
14 years 11 months ago
2007
We investigate the notion of quantum chromatic number of a graph, which is the minimal number of colours necessary in a protocol in which two separated provers can convince a refe...
CORR
2004
Springer
14 years 11 months ago
2004
Springer
This article is not a research paper, but a little note on the history of combinatorics: we present here a tentative short biography of Henri Delannoy, and a survey of his most no...
COMBINATORICS
2000
14 years 11 months ago
2000
A (multi)hypergraph H with vertices in N contains a permutation p = a1a2 . . . ak of 1, 2, . . . , k if one can reduce H by omitting vertices from the edges so that the resulting ...
107
click to vote
COMBINATORICS
1998
14 years 11 months ago
1998
We show that the moments of the trace of a random unitary matrix have combinatorial interpretations in terms of longest increasing subsequences of permutations. To be precise, we s...