Office Hours
by appointment

Selected Publications

1. D.E. Edmunds, J. Lang, Behaviour of the approximation numbers of a Sobolev embedding in the one-dimensional case, Journal of Functional Analysis, Accepted (2003),
2. W.D. Evans, D.J. Harris and J. Lang, The approximation numbers of Hardy-type operators on trees, Proc. London Math. Soc, (3) 83 (2001), no. 2, 390--418
3. J. Lang, Improved Estimates for the Approximation Numbers of Hardy-Type Operator. Journal of Approximation Theory, Accepted (2002)
4. D.E. Edmunds, R. Kerman and J. Lang, Remainder estimates for the approximation numbers of weighted Hardy operators acting on $L\sp 2$. J. Anal. Math. 85 (2001), 225--243
5. J. Lang and L. Pick, The Hardy operator and the gap between $L^{\infty}$ and BMO , J. London Math. Soc, (2) 57 (1998), 196--208