{"version":"1.0","type":"link","title":"Direct sum - Newikis","description":"In mathematics, more specifically in algebra, the direct sum of a collection of abelian groups is an abelian group constructed by combining the given groups as described below. If the input abelian groups have additional structure (for example, are vector spaces, modules, or topological abelian…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}