2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50944Various forms of derivative dispersion relations, in which the dispersion integral is replaced by a series of derivatives of the imaginary part of a scattering amplitude, are reviewed. Conditions of their validity and practical applicability as well as their relevance to high-energy small-angle hadron-hadron scattering are discussed.8 pages, latex using elsart.sty, no figures, Presented at 9th Blois Workshop on Elastic and Diffractive Scattering, Pruhonice, Prague, Czech Republic, June 2001High Energy Physics - Theorytext