The 5 modular characters of the sporadic simple Fischer groups Fi22 and Fi23 this paper is a contribution to the DFG research project "Algorithmic number theory and algebra" - Hiß, Gerhard; Lux, Klaus; Hiß, Gerhard; Lux, Klaus (Interdisziplinäres Zentrum für Wissenschaftliches Rechnen <Heidelberg>: Preprint, 1993)