Mots-clés:
1998, ALGEBRES DE HOPF, ATIYAH, CHERN, COHOMOLOGIE, CONNES, DIXMIER, EN, FUCHS, GELFAND, GEOMETRIE DIFFERENTIELLE, GUILLEMIN, HAEFLIGER, HCERN, HILBERT, HOCHSCHILD, HOPF, KOSZUL, LIE, MANIN, MILNOR, MOORE, MORITA, MOSCOVICI, NELSON, PONTRJAGIN, RIEMANN, SCHWARTZ, SINGER, STINESPRING, WEIL, WODZICKI