Search results for "HBO"

Some properties of vertex-oblique graphs

2016

The type t G ( v ) of a vertex v ? V ( G ) is the ordered degree-sequence ( d 1 , ? , d d G ( v ) ) of the vertices adjacent with v , where d 1 ? ? ? d d G ( v ) . A graph G is called vertex-oblique if it contains no two vertices of the same type. In this paper we show that for reals a , b the class of vertex-oblique graphs G for which | E ( G ) | ? a | V ( G ) | + b holds is finite when a ? 1 and infinite when a ? 2 . Apart from one missing interval, it solves the following problem posed by Schreyer et?al. (2007): How many graphs of bounded average degree are vertex-oblique? Furthermore we obtain the tight upper bound on the independence and clique numbers of vertex-oblique graphs as a fun…

Bounds for minimum feedback vertex sets in distance graphs and circulant graphs

2008

Graphs and Algorithms

Every triangle-free induced subgraph of the triangular lattice is(5m,2m)-choosable

2014

A graph G is (a,b)-choosable if for any color list of size a associated with each vertex, one can choose a subset of b colors such that adjacent vertices are colored with disjoint color sets. This paper proves that for any integer m>=1, every finite triangle-free induced subgraph of the triangular lattice is (5m,2m)-choosable.

The λ-Error Order in Multivariate Interpolation

2005

The aim of this article is to introduce and to study a generalization of the error order of interpolation, named λ – error order of interpolation. This generalization makes possible a deeper analysis of the error in the interpolation process. We derived the general form of the λ – error order of interpolation and then we applied it for many choices of the functional λ.

Groups whose prime graph on conjugacy class sizes has few complete vertices

2012

Abstract Let G be a finite group, and let Γ ( G ) denote the prime graph built on the set of conjugacy class sizes of G. In this paper, we consider the situation when Γ ( G ) has “few complete vertices”, and our aim is to investigate the influence of this property on the group structure of G. More precisely, assuming that there exists at most one vertex of Γ ( G ) that is adjacent to all the other vertices, we show that G is solvable with Fitting height at most 3 (the bound being the best possible). Moreover, if Γ ( G ) has no complete vertices, then G is a semidirect product of two abelian groups having coprime orders. Finally, we completely characterize the case when Γ ( G ) is a regular …

Exploring Neighborhood Influences on Small-Area Variations in Intimate Partner Violence Risk: A Bayesian Random-Effects Modeling Approach

2014

This paper uses spatial data of cases of intimate partner violence against women (IPVAW) to examine neighborhood-level influences on small-area variations in IPVAW risk in a police district of the city of Valencia (Spain). To analyze area variations in IPVAW risk and its association with neighborhood-level explanatory variables we use a Bayesian spatial random-effects modeling approach, as well as disease mapping methods to represent risk probabilities in each area. Analyses show that IPVAW cases are more likely in areas of high immigrant concentration, high public disorder and crime, and high physical disorder. Results also show a spatial component indicating remaining variability attribut…

Embolia Gassosa Arteriosa: Case Report.

2002

Participative Planning Processes in the Absence of the (Public) Space of Democracy

2010

Abstract This article aims to investigate the role, limits and opportunities of participation programmes in a local political context where consensus-building and inclusionary practices are not high priorities. A public housing neighbourhood in Palermo is used as a case study in order to critically highlight the ambiguous role that participative practices tend to play in fragile contexts. The case study also highlights the need for some preconditions for effective participatory practices in planning. These preconditions are focused on Arendt's notion of the ‘space of democracy’. Some concepts developed by Hannah Arendt will be used to explain the necessity of these preconditions, and their …

Discrimination based on place of residence and access to employment

2014

International audience; The purpose of this study is to assess the degree of employment discrimination against young people according to their place of residence. We considered several spatial scales in order to measure the effect of the reputation of the administrative department or county, the town or municipality and of the local neighbourhood. The evaluation is performed using correspondence test data carried out between October 2011 and February 2012. We studied 2988 candidacies that were submitted to 498 job offers (waiters and cooks) within the restaurant industry and located in the Paris area. Statistical and econometric results pointed out that resident effect is significant and im…

Urban segregation and unemployment: A case study of the urban area of Marseille – Aix-en-Provence (France)

2018

International audience; In this paper, we study the effects of the spatial organization of the urban area of Marseille – Aix-en-Provence on unemployment there. More specifically, differences in the characteristics of the residential population induce urban stratification with the result that urban structure may affect the probability of employment. In order to evaluate the effects of spatial structure on unemployment, we implement a spatial probit model to reveal the employment probabilities of young adults still living with their parents. Our results support the hypothesis that living in or near a deprived neighborhood decreases the probability of employment.