%0 Journal Article %A A. Böttcher %T On the approximation numbers of large Toeplitz matrices %J Documenta mathematica %D 1997 %P 1-29 %V 2 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/21/ %R 10.4171/dm/21 %F 10_4171_dm_21