François Bresson (1921-1996)

Edwin Henry Spanier 1921--1996

704 NOTICES OF THE AMS VOLUME 45, NUMBER 6 Edwin Henry Spanier died of cancer in Scottsdale, Arizona, on October 11, 1996. Born in Washington, D.C., on August 8, 1921, he was graduated from the University of Minnesota in 1941 and then spent three years as a mathematician in the U. S. Army Signal Corps. He received his doctorate in mathematics in 1947 from the University of Michigan under the di...

Roberto Caldeyro-Barcia (1921?1996)

Roberto Caldeyro-Barcia studied fetal health in Uruguay during the second half of the twentieth century. Caldeyro-Barcia developed Montevideo units, which are used to quantify intrauterine pressure, or the force of contractions during labor. Intrauterine pressure is a useful measure of the progression of labor and the health of a fetus [3]. Caldeyro-Barcia?s research on fetal health often contr...

The Planar One - Legged Hopper Charles François - Claude Samson N ̊ 3027 November 1996

The paper addresses the problem of energy-eecient control of running legged mechanisms via the case study of the planar one-legged hopper. Due to its mechanical simplicity, the planar one-legged hopper is generally considered as the basic prototype of mechanisms capable of ballistic running gaits. What makes this system particularly interesting is that, endowed with a proper selection of spring...

19 April 2013 − − François

Assignment 3 François Séguin

Question 1 First, we have that λ − λ − 2 = (λ + 1)(λ − 2). Therefore, it is true that the eigenvalues of the corresponding adjacency matrix come in pairs of additive inverse. However, notice that ± √ −1 are eigenvalues, and therefore the associated matrix cannot be symmetric (there would only be real eigenvalues). We conclude that no undirected graph can have the above characteristic polynomial...