In memoriam: Philippe Flajolet, the father of analytic combinatorics Bruno Salvy, Robert Sedgewick, Michèle Soria, Wojciech Szpankowski and Brigitte Vallée RAIRO-Theor. Inf. Appl., 45 4 (2011) 371-373 Published online: 22 August 2011 DOI: 10.1051/ita/2011110