2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141965Dwyer, Weiss, and Williams have recently defined the notions of parametrized topological Euler characteristic and parametrized topological Reidemeister torsion which are invariants of bundles of compact topological manifolds. We show that these invariants satisfy additivity formulas paralleling the additive properties of the classical Euler characteristic and Reidemeister torsion of finite CW-complexes.Minor stylistic changes; published in K-TheoryAlgebraic TopologyK-Theory and Homology19D10, 55R70text