2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158120In this paper, we discuss relations among several invariants of 3-manifolds including Meyer's function, the eta-invariant, the von Neumann rho-invariant and the Casson invariant from the viewpoint of the mapping class group of a surface.10 pagesGeometric Topology57R20; 57M27text