%0 Journal Article %A Feng-Yu Wang %T $L^1$-convergence and hypercontractivity of diffusion semigroups on manifolds %J Studia Mathematica %D 2004 %P 219-227 %V 162 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm162-3-3/ %R 10.4064/sm162-3-3 %G en %F 10_4064_sm162_3_3