Numerous people (more than 160 now and counting) have been looking forward to registering to the conference we organize in honor of Jean-Yves. The Hermite amphitheater, where the talks will be given, is not supposed to host more than 150 persons. For that reason, we are forced to advance the closing date for registration to Sunday February 24th, at 23h59 (11:59 pm), Paris time.