2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64906We generalise a method of Xiao Gang to construct 'prototypes' of fibred surfaces with maximal irregularity without being a product. This enables us, in the case of fibre genus g=3 to describe the possible singular fibres and to calculate the invariants of these surfaces. We also prove structure theorems on the moduli space for fibred surfaces with fibre genus g=2 and g=3.23 pagesAlgebraic Geometry14J10, 14J29, 14D06text