John M. Sullivan

TL;DR: In this article, an algorithm for maintaining an approximating triangulation of a deforming surface in R 3 is described, where the surface is the envelope of an infinite family of spheres defined and controlled by a finite collection of weighted points.

TL;DR: This article examined the dual processes of target group selection and deciding the extent to which one tolerates target groups, once they are selected, and found that although the social and psychological processes underlying political tolerance are very similar in the two contexts, there are significant political differences between the two nations which do affect the impact of individual level variables on tolerance.

TL;DR: It is shown it is possible to tile three-dimensional space using only tetrahedra with acute dihedral angles, and several constructions to achieve this are presented, including one in which all di cathedral angles are less than 74.21°.

TL;DR: In this paper, a theory of ropelength criticality was introduced to deal with links in a fixed link-homotopy class, where the ratio of length over thickness of a link is defined as a measure of thickness for links.