output
19992026
most citedSparsistency and rates of convergence in large covariance matrix estimation

421 citations

Showing 2009Show all

13 papers · 1 filter

math.CO2009★ 1 cited

Toughness and Vertex Degrees

D. Bauer, H. J. Broersma, J. van den Heuvel +2

We study theorems giving sufficient conditions on the vertex degrees of a graph to guarantee is -tough. We first give a best monotone theorem when , but then show…

math.CO2009★ 3 cited

Families of parameters for SRNT graphs

Norman Biggs

The feasibility conditions obtained in a previous report are refined, and used to determine several infinite families of feasible parameters for strongly regular graphs with no tri…

q-fin.PM2009

Optimal investment with inside information and parameter uncertainty

Albina Danilova, Michael Monoyios, Andrew Ng

This paper has been withdrawn by the authors pending corrections.

math.PR2009

Further calculations for the McKean stochastic game for a spectrally negative Levy process: from a point to an interval

Erik J. Baurdoux, Kees van Schaik

Following Baurdoux and Kyprianou [2] we consider the McKean stochastic game, a game version of the McKean optimal stopping problem (American put), driven by a spectrally negative L…

cs.DM2009★ 2 cited

Regular Matroids with Graphic Cocircuits

Konstantinos Papalamprou, Leonidas Pitsoulis

We introduce the notion of graphic cocircuits and show that a large class of regular matroids with graphic cocircuits belongs to the class of signed-graphic matroids. Moreover, we…

math.OC2009★ 1 cited

The Gilbert Arborescence Problem

M. G. Volz, M. Brazil, C. J. Ras +2

We investigate the problem of designing a minimum cost flow network interconnecting n sources and a single sink, each with known locations in a normed space and with associated flo…

cs.NI2009★ 131 cited

Community Cloud Computing

Alexandros Marinos, Gerard Briscoe

Cloud Computing is rising fast, with its data centres growing at an unprecedented rate. However, this has come with concerns over privacy, efficiency at the expense of resilience,…

math.CO2009

Shadows of ordered graphs

Béla Bollobás, Graham Brightwell, Robert Morris

Isoperimetric inequalities have been studied since antiquity, and in recent decades they have been studied extensively on discrete objects, such as the hypercube. An important spec…

cs.NI2009★ 19 cited

Digital Ecosystems in the Clouds: Towards Community Cloud Computing

Gerard Briscoe, Alexandros Marinos

Cloud Computing is rising fast, with its data centres growing at an unprecedented rate. However, this has come with concerns of privacy, efficiency at the expense of resilience, an…

math.CO2009★ 7 cited

On the representability of totally unimodular matrices on bidirected graphs

L. Pitsoulis, K. Papalamprou, G. Appa +1

Seymour's famous decomposition theorem for regular matroids states that any totally unimodular (TU) matrix can be constructed through a series of composition operations called -…

math.DS2009

How many times can a function be iterated?

Massimo Gobbino, Robert Samuel Simon

Let C be a closed subset of a topological space X, and let f : C --> X. Let us assume that f is continuous and f(x) lies in C for every x in the boundary of C. How many times can o…

math.CO2009

Order-invariant measures on fixed causal sets

Graham Brightwell, Malwina Luczak

A causal set is a countably infinite poset in which every element is above finitely many others; causal sets are exactly the posets that have a linear extension with the order-type…

math.PR2009★ 8 cited

Order-invariant measures on causal sets

Graham Brightwell, Malwina Luczak

A causal set is a partially ordered set on a countably infinite ground-set such that each element is above finitely many others. A natural extension of a causal set is an enumerati…