{"product_id":"almost-completely-decomposable-groups","title":"Almost Completely Decomposable Groups","description":"An almost completely decomposable abelian (acd) group is an extension of a finite direct sum of subgroups of the additive group of rational numbers by a finite abelian group. Examples are easy to write and are frequently used but have been notoriously difficult to study and classify because of their computational nature. However, a general theory of acd groups has been developed and a suitable weakening of isomorphism, Lady's near-isomorphism, has been established as the rightconcept for studying acd groups. A number of important classes of acd groups has been successfully classified. Direct sum decompositions of acd groups are preserved under near-isomorphism and the well-known pathological decompositions can actually be surveyed in special cases.","brand":"Taylor \u0026 Francis Ltd","offers":[{"title":"Default Title","offer_id":54236997648728,"sku":"9789056992255","price":229.4,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/1295\/4195\/files\/9789056992255.jpg?v=1769560214","url":"https:\/\/agendabookshop.com\/products\/almost-completely-decomposable-groups","provider":"Agenda Bookshop","version":"1.0","type":"link"}