direct sum

1. 1.

   a union of two disjoint sets in which every element is the sum of an element from each of the disjoint sets

   Broaderunion

Questions about direct sum

What does direct sum mean?

direct sum means "a union of two disjoint sets in which every element is the sum of an element from each of the disjoint sets".

Is direct sum a common word?

direct sum is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.