Results 21 to 30 of about 1,385 (101)

Cutoff for the Transposition Walk on Permutations with One-Sided Restrictions [PDF]

open access: yes, 2012
This paper explores the mixing time of the random transposition walk on permutations with one-sided interval restrictions. In particular, we're interested in the notion of cutoff, a phenomenon which occurs when mixing occurs in a window of order smaller ...
Blumberg, Olena
core  

The rook numbers of Ferrers boards and the related restricted permutation numbers

open access: yesJournal of Statistical Planning and Inference, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Optimal softening for force calculations in collisionless N-body simulations

open access: yes, 1999
In N-body simulations the force calculated between particles representing a given mass distribution is usually softened, to diminish the effect of graininess. In this paper we study the effect of such a smoothing, with the aim of finding an optimal value
Athanassoula, E.   +3 more
core   +1 more source

The inverse rook problem on Ferrers boards

open access: yes, 2004
Rook polynomials have been studied extensively since 1946, principally as a method for enumerating restricted permutations. However, they have also been shown to have many fruitful connections with other areas of mathematics, including graph theory, hypergeometric series, and algebraic geometry.
openaire   +2 more sources

Media – the Video Appeals Committee [PDF]

open access: yes, 1999
Review of the work of the Video Appeals Committee which hears appeals from makers of videos from decisions of the British Board of Film Classification, to refuse certificates or to grant certificates in respect of videos works, with which they disagree ...
Wood, John
core  

Enumerative properties of Ferrers graphs

open access: yes, 2007
We define a class of bipartite graphs that correspond naturally with Ferrers diagrams. We give expressions for the number of spanning trees, the number of Hamiltonian paths when applicable, the chromatic polynomial, and the chromatic symmetric function ...
Ehrenborg, Richard   +1 more
core   +2 more sources

Intersection representation of digraphs in trees with few leaves

open access: yes, 1997
The leafage of a digraph is the minimum number of leaves in a host tree in which it has a subtree intersection representation. We discuss bounds on the leafage in terms of other parameters (including Ferrers dimension), obtaining a string of sharp ...
Lin, In-Jen   +2 more
core   +2 more sources

Red for danger in systematic reviews? [PDF]

open access: yesEur J Hosp Pharm, 2021
Moore A.
europepmc   +1 more source

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