%0 Journal Article %T On pointed Hopf algebras associated with alternating and dihedral groups %A Andruskiewitsch %A Nicol¨¢s %A Fantino %A Fernando %J Revista de la Uni£¿3n Matem£¿£¿tica Argentina %D 2007 %I Uni¨®n Matem¨¢tica Argentina %X we classify finite-dimensional complex pointed hopf algebras with group of group-like elements isomorphic to . we show that any pointed hopf algebra with infinitesimal braiding associated with the conjugacy class of is infinite-dimensional if the order of is odd except for in . we also study pointed hopf algebras over the dihedral groups. %U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S0041-69322007000300004&lng=en&nrm=iso&tlng=en