The construction of causal graphs from non-experimental data rests on a set of constraints that the graph structure imposes on all probability distributions compatible with the graph. These constraints are of two types: conditional independencies and algebraic constraints, first noted by Verma. While conditional independencies are well studied and frequently used in causal induction algorithms,...

In 1980, Christol, Kamae, Mendès France and Rauzy stated in [3] an important theorem in automata theory. This theorem links sequences recognized by automata and algebraic formal power series. In 1994, Bruyère, Hansel, Michaux and Villemaire extended this theorem with a logical link in [2]. With theses two articles, we can translate the property for a formal power series to be algebraic in combi...

We construct an explicit set of algebraically independent generators for the center of the universal enveloping algebra of the centralizer of a nilpotent matrix in the general linear Lie algebra over a field of characteristic zero. In particular, this gives a new proof of the freeness of the center, a result first proved by Panyushev, Premet and Yakimova.

To outsiders, it might seem natural—obvious, even—that you could use physics to make animated characters move in games and movies. The surprising fact is that physics-based characters have never been very successful in production. However, over the last few years, physicsbased character animation has been experiencing tremendous growth and a great deal of attention in computer graphics research...

This preprint is part of a longer article in which we will show that any PS–overtwisted manifold is algebraically overtwisted. In dimension 3, this has already been proved for overtwisted manifolds by Eliashberg and Yau [Yau06]. The “correct” definition of algebraically overtwisted should be the strongest contact invariant that is not able to distinguish overtwisted contact manifolds (unfortuna...

There has been a recent resurgence of interest in the relationship between income inequality and growth. We use the WIDER/UNDP World Income Inequality Database to investigate the effects of inequality and trade liberalisation on growth in a sample of exclusively developing countries. Cross-section (long-run) and panel (short run) techniques are used to test for the effect of inequality on growt...

Traffic modeling has become a major issue for many cities throughout the world. There are number of simulation tools and websites available which can depict the urban Traffic situations. Our work extends the concept of Traffic Website Design which should be independent of platform as well as device.

Virtualised systems have experienced a resurgence in popularity in recent years, particularly in supporting a large number of independent services on a single host. This paper describes our work designing and implementing Proper, a service running on the PlanetLab system, that allows other services to perform privileged operations in a safe, controlled manner. We describe how implementing such ...