2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43807The physics impact of a precise determination of the top-quark mass, m_t, at the Linear Collider (LC) is discussed, and the results are compared with the prospective accuracy at the LHC. The importance of a precise knowledge of m_t for electroweak precision observables and for Higgs physics in the MSSM is pointed out in particular. We find that going from hadron collider to LC accuracy in m_t leads to an improvement of the investigated quantities by up to an order of magnitude.4 pages, 2 figures, to appear in the proceedings of LCWS04, Paris, April 2004High Energy Physics - Phenomenologytext