EntityQ3845212· pop 7· linked from 74 articlesmapping class groupSign in to saveGroup of isotopy classes of a topological automorphism groupConnectionsexact sequenceEntity3-manifoldEntitymathematicsEntityInternational Standard Book NumberEntitydigital object identifierEntitysurfaceEntitytorusEntitycontinuous functionEntityMöbius stripEntityJSTOREntitybibcodeEntityunionEntityinverse functionEntityQ118398EntityintersectionEntitytopological spaceEntitymanifoldEntityhomeomorphismEntitycategory theoryEntityif and only ifEntityCategoriesGeometric topologyHomeomorphisms