We recall Jacques Raynal’s career, his main bibliographical data and achievements, summarizing topics of interest works. also give some biographical personal data. have collected a few words about him from friends colleagues, in addition to those given by the authors articles published this EPJA issue memory Emperor ECIS code.

Representing networks is a major interest of researchers in information visualization. In this article, I present novel visualization techniques based on Jacques Bertin’s reorderable matrices. As the human brain is particularly effective at processing visual information, researchers in computer science developed a number of visual exploration systems to analyze graphs and networks. In the last ...