Francis Day Curtis

Francis Barr

influenza programme chief, reported an increase in the number of cluster cases reported recently, with the biggest being a family of five cases. There have been seven cluster cases in Vietnam, all within single families, most recently in the northern province of Haiphong. No relative has been proved to have passed the disease to another in these cases but, Horby said, " the onset dates could be...

Francis Wolenski

Stochastic Discrete Clenshaw-Curtis Quadrature

The partition function is fundamental for probabilistic graphical models—it is required for inference, parameter estimation, and model selection. Evaluating this function corresponds to discrete integration, namely a weighted sum over an exponentially large set. This task quickly becomes intractable as the dimensionality of the problem increases. We propose an approximation scheme that, for any...

The Finitary Andrews-Curtis Conjecture

The well known Andrews-Curtis Conjecture [2] is still open. In this paper, we establish its finite version by describing precisely the connected components of the Andrews-Curtis graphs of finite groups. This finite version has independent importance for computational group theory. It also resolves a question asked in [5] and shows that a computation in finite groups cannot lead to a counterexam...

Valerie Curtis and Adam Biran

Anthropologists have long puzzled over why certain objects and activities are avoided, reviled, or proscribed in many cultures. Numerous theories have been proposed, but as Reinhart (1990) suggests above, a full explanation remains elusive. Psychologists recently have begun to explore the nature of the revulsion that is occasioned by the sight of excreta, rotten food, slime, and bugs. They have...