2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/144834In this paper necessary and sufficient conditions are stated for the Craig-Sakamoto equation det(I-sA-tB) = det(I-sA)det(I-tB), for all scalars s, t. Moreover, spectral properties for A and B are investigated.International Conference of Applied and Engineering Mathematics (ICAEM 2007), LondonRings and Algebrastext