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The behaviour of random discrete structures at criticality

Ziel

Our primary research focus will be the behaviour of random discrete structures, with an emphasis on random graphs and percolation clusters. We will investigate the internal behaviour of such structures in the critical case - the moment when a large cluster emerges.

In particular, we will investigate such questions as the cluster sizes, robustness of connectivity, and shortest paths between vertices in the same cluster. Such questions have been well-studied in both sub- and supercritical settings, but detailed information about them in the critical case remains elusive.

We also aim to unify work on the heights of random trees with existing knowledge for the diameters of first-passage percolation clusters, and thereby to fully understand the moments of the diameter of first-passage percolation clusters in a wide class of infinite deterministic and random trees. We will also pursue similar questions to those listed above in random geometric graphs such as the Voronoi diagram, k-nearest-neighbour graphs, and the like.

We will pursue this research using tools from combinatorics, notably random graph theory, recent developments in percolation theory such as the use of the percolation-theoretic triangle inequality in finite settings, and probabilistic tools, particularly concentration of measure inequalities. Our research is aimed at answering certain key questions that arise random discrete structures in many settings.

The precise questions turn out to be slightly different depending on the setting but there is an underlying and unifying question which is driving our pursuit: what do random discrete structures look like at the moment they change from being small to being large?

This research aims to be a step in elucidating that question and making some progress towards its solution.

Wissenschaftliches Gebiet (EuroSciVoc)

Schlüsselbegriffe

Thema/Themen

Aufforderung zur Vorschlagseinreichung

FP6-2005-MOBILITY-5
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Finanzierungsplan

EIF - Marie Curie actions-Intra-European Fellowships

Koordinator

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
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OXFORD
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