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Next: Appendix A: Delta functions Up: Nonorthogonal generalized Wannier function Previous: Conclusions


C.-K. S. would like to thank the EPSRC (grant number GR/M75525) for postdoctoral research funding. A. A. M. would like to thank the EPSRC for a Ph.D. studentship. P. D. H. would like to thank Magdalene College, Cambridge for a Reseach Fellowship. O. D. would like to thank the European Commission for a Research Training Network Fellowship (grant number HPRN-CT-2000-00154).

Peter D. Haynes 2002-10-31