%0 Journal Article %T Acceleration of nonhyperbolic sequences of Mann %A M¨¢rio M. Gra a %J International Journal of Mathematics and Mathematical Sciences %D 2002 %I Hindawi Publishing Corporation %R 10.1155/s0161171202013340 %X Mann's sequences are difficult to accelerate in the presence of a nonhyperbolic fixed point. New accelerators are constructed for Mann's sequences which are useful even for other sets of very slowly convergent sequences. %U http://www.hindawi.com/journals/ijmms/2002/398196/abs/