We consider mappings between edge sets of graphs that lift tensions to tensions. Such mappings are called tension-continuous mappings (shortly mappings). Existence of a mapping induces a (quasi)order on the class of graphs, which seems to be an essential extension of the homomorphism order (studied extensively, see [10]). In this paper we study the relationship of the homomorphism and orders. W...

The existence of a natural and projectively equivariant quantization in the sense of Lecomte [20] was proved recently by M. Bordemann [4], using the framework of Thomas-Whitehead connections. We give a new proof of existence using the notion of Cartan projective connections and we obtain an explicit formula in terms of these connections. Our method yields the existence of a projectively equivar...

The Dutch fear of violence involving Muslims typifies the implicit association that people easily seem to make between Muslims and violence. Almost irrespective of the actual level of violent incidents, Muslims seem to project an image of responding violently to every political incident. How did this image come into being? In the Netherlands, what types of incidents and developments have occurr...

This paper identifies the critical learning trade-offs that managers face when defining their learning strategies. We integrate these learning choices into three configurations of learning strategies: " Explorers " , " Exploiters " , and " Innovators " , and address whether there is one optimal configuration of the learning tensions that leads to a superior learning strategy, or whether differe...

Abstract: Achievement gaps refer to the difference in the performance on examinations of students belonging to different social groups. Achievement gaps between ethnic groups have been observed in several countries with heterogeneous populations. In this paper, we analyze achievement gaps between ethnic populations in Brazil by studying the performance of a large cohort of senior high-school st...

Abstract The Brexit process has shattered the foundations of British politics, with prime ministerial resignations, government defeats, continuous rebellions and floor-crossings. These phenomena seem at odds usual decisiveness Westminster systems. However, aforementioned departures from tradition could be interpreted as compatible typical distance any empirical reality theoretical models, excep...

The incidence of cosourcing – or the provision of standardised services to a group of organisations – appears to be on the increase. Based upon economies of scale, and resource based and resource dependency theories this paper presents a decision making framework to help organisations understand why, and for what, cosourcing is appropriate. A case study of the Australian financial services indu...