Notre collegue Alain Erlande-Brandenburg est decede le 6 juin dernier, a l’âge de 82 ans. Il etait ne 2 aout 1937 Luxeuil-les-Bains ou son grand-pere maternel exercait la medecine. avait repris nom plume paternel, Albert Brandenburg, qui publie un œuvre romanesque sous d’Albert Erlande. comptait aussi parmi ses parents l’egyptologue Eugene Revillout (1843-1913), specialiste demotique et, disait...

D. Jakubowski Wisner, B. Chang, H. Tso, C. Flowers, B. N. Joe, J. Lessing, J. Gibbs, K. Itakura, S. Hwang, and N. Hylton Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, School of Medicine, University of California, San Francisco, San Francisco, CA, United States, Surgery, University of California, San Francisco, San Francisco, CA, Uni...

Let G be a 2-connected graph on n vertices and let X C__ V(G). We say that G is X-cyclable if G has an X-cycle, i.e., a cycle containing all vertices of X. We denote by ~(X) the maximum number of pairwise nonadjacent vertices in the subgraph G[X] of G induced by X. If G[X] is not complete, we denote by ~(X) the minimum cardinality of a set of vertices of G separating two vertices of X. By 6(X) ...

A graph G of order n is called arbitrarily vertex decomposable if for each sequence (a1, . . . , ak) of positive integers such that a1+. . .+ak = n there exists a partition (V1, . . . , Vk) of the vertex set of G such that for each i ∈ {1, . . . , k}, Vi induces a connected subgraph of G on ai vertices. D. Barth and H. Fournier showed that if a tree T is arbitrarily vertex decomposable, then T ...

This study examines shareholder risk and rates of return in union and nonunion companies in 1973-87. Shareholder risk declined with the extent of union coverage in the 1970s, and returns were lower among highly unionized companies than among other companies during the late 1970s and early 1980s. Unionnonunion differences in risk were small and insignificant by the mid-1980s, however, and there ...

Conformal mapping has been a familiar tool of science and engineering for generations. The methods of numerical mapping are usually classified into those which construct the map from standard domain such as the unit disk onto the ‘problem domain’, and those which construct the map in the reverse direction. We treat numerical conformal mapping from the unit disk onto the Jordan regions as the pr...

In this work we study the problem of reconstructing an image from a perceptual segmentation based on a geometric classification of its points using non-linear curvature filters. We give a mathematical proof that an image can be reconstructed from the regions of non-zero gaussian curvatures. This result provides the theoretical background for a new theory of non-linear two dimensional signal pro...