2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47836I present a method for calculating heavy quark production which extrapolates smoothly from the well understood limits of the fixed-flavour number scheme for Q^2 approx m_H^2 to the zero-mass scheme at Q^2/m_H^2 -> infinity. For all Q^2 > m_H^2 the evolution of the heavy quark distribution is precisely as in the massless MSbar scheme. The method is simple to implement and compares well with data.4pages, Latex, 2 postscript figures. Contribution to International Workshop on Deep Inelastic Scattering and QCD, DIS98, Brussels, Belgium, April 1998High Energy Physics - Phenomenologytext