Dear all, I wish you an happy new year 2004. Here are two announcements: One new preprint: Title: S-homotopy as an analogue of homotopy of spaces Abstract: We check that there exists a structure of model category on the category of flows whose weak equivalences are the S-homotopy equivalences. This model structure is simplicial, but not topological. Url: ArXiv math.AT/0401033 or http://www.pps.jussieu.fr/~gaucher/ ---------------------------------------------------------------------------------------------------- One new version of another preprint: Title: Homotopy branching space and weak dihomotopy Comments: new results about globular complexes added ; one technical proof posponed to the appendix Url: ArXiv math.AT/0304112 or http://www.pps.jussieu.fr/~gaucher/ pg.