direct sum
English
Noun
direct sum (plural direct sums)
- (mathematics) coproduct in some categories, like abelian groups, topological spaces or modules
- (linear algebra) A linear sum in which the intersection of the summands has dimension zero. Equivalently, a linear sum of two subspaces, any vector of which can be expressed uniquely as a sum of two vectors: one vector belonging to the first subspace, and the other vector belonging to the second subspace.
Translations
coproduct in some categories
Further reading
- (linear algebra):
