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Noun: direct sum
  1. A union of two disjoint sets in which every element is the sum of an element from each of the disjoint sets

Derived forms: direct sums

Type of: join, sum, union

Encyclopedia: Direct sum

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direct examination
direct fire
direct flight
direct loan
direct mail
direct mailer
direct marketing
direct object
direct primary
direct quotation
direct sum
direct support
direct supporting fire
direct tax
direct tide
direct transmission
direct trust
directed
directed study
directed verdict
direct-grant school