2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/230821In here we define the concept of fibered symmetric bimonoidal categories. These are roughly speaking fibered categories D->C whose fibers are symmetric monoidal categories parametrized by C and such that both D and C have a further structure of a symmetric monoidal category that satisfy certain coherences that we describe. Our goal is to show that we can correspond to a fibered symmetric bimonoidal category an E_{\infty}-ring spectrum in a functorial way.66 Pages. Submitted to the Journal of Pure and Applied Algebra August 2008Algebraic TopologyCategory Theory18D10;18D30;19D23text