We study property RD in terms of rapid decay of matrix coefficients. We give new formulations of property RD in terms of a L-integrability condition of a Banach representation. Combining this new definition with the existence of cyclic subgroups of exponential growth in non-uniform lattices in semisimple Lie groups, we deduce that there exist matrix coefficients associated to several kinds of q...

We prove some new results on quasi-regular Dirichlet forms. These include results on perturbations of Dirichlet forms, change of speed measure, and tightness. The tightness implies the existence of an associated right continuous strong Markov process. We also discuss applications to a number of examples including cases with possibly degenerate (sub)-elliptic part, diffusions on loops spaces, an...

For a G-variety X with an open orbit, we define its boundary ∂X as the complement of the open orbit. The action sheaf SX is the subsheaf of the tangent sheaf made of vector fields tangent to ∂X. We prove, for a large family of smooth spherical varieties, the vanishing of the cohomology groups Hi(X,SX) for i > 0, extending results of F. Bien and M. Brion [BB96]. We apply these results to study t...

The topic of amodal completion has often been investigated by using partly occluded shapes that are regular. In research that has typically been done with displays such as these regular shapes, it has been shown that global aspects of a shape can determine completion. To see how robust these global influences in the completion process are, we investigated quasi-regular shapes, ie shapes with a ...

New upper bounds for the number of independent sets in graphs are obtained. c © 2006 Published by Elsevier Ltd 1. Definitions and the statement of results All graphs under consideration are finite, undirected, and simple. The vertices are considered as numbered. Denote the degree of a vertex v by σ(v). G is called an (n, k, θ)-graph if it has n vertices and k ≤ σ(v) ≤ k + θ for any vertex v. Ev...

A quasi-experimental design was used to test the effects of viewing the movie “Freeway” on theory assessment scores for selected groups of undergraduate Criminal Justice students. The quasi-experimental group viewed the video and participated in an out-of-class study session to apply criminological theories to the events in the movie whereas the control group received only regular classroom ins...

The concept of q , -fuzzy ternary subsemigroup (left, right, lateral, quasi-, bi-) ideal of a ternary semigroup is introduced and several related properties are investigated. We give some characterizations of regular and weakly regular ternary semigroups by q , -fuzzy left (right, lateral) ideals, q , -fuzzy quasi-ideals and q , -fuzzy bi-(generalized bi-) ideals.