2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40422Pade approximations appear to be a powerful tool to extend the validity range of expansions around certain kinematical limits and to combine expansions of different limits to a single interpolating function. After a brief outline of the general method, we will review a number of recent applications and describe the modifications that have to be applied in each case. Among these applications are the MS-bar/on-shell conversion factor for quark masses and the top decay rate at NNLO in QCD.13 pages, latex, 4 figures (9 ps-files). Invited talk at the 5th International Symposium on Radiative Corrections (RADCOR-2000), Carmel, CA, USA, 11-15 September, 2000High Energy Physics - Phenomenologytext