Dual

Look up dual in Wiktionary, the free dictionary.

Dual may refer to:

• a pair or a grouping of two:
  • dual basis, in mathematics, a basis that uniquely has a zero or unity inner product with a given basis
  • dual diagnosis, a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem
  • dual fertilization, simultaneous application of a P-type and N-type fertilizer
  • DUAL table, a special kind of one-row and one-column database table
  • dual (grammatical number) - a grammatical category used in some languages.
  • dual problem, in linear programming, the primary problem and the dual problem are complementary

• duality, a property of something with two states:
  • in electronics, see dual (electronics)
  • in mathematics, see duality (mathematics)
  • in geometry, see dual polyhedron
  • in logic and philosophy, see duality

• an acronym (DUAL):
  • Diffusing update algorithm, used to update Internet protocol routing tables
• a proper name:
  • Dual, a manufacturer of Hifi equipment
  • Dual!, an anime series

• Dual is also:
  • DUAL (cognitive architecture), an artificial intelligence design model
  • a homonym of 'duel', with various meanings
  • "Dual" (Heroes), an episode of Heroes
  • Dual (film)
  • Dual (album), an album of traditional Scottish and Irish music recorded by Éamonn Doorley, Muireann Nic Amhlaoibh, Julie Fowlis & Ross Martin, released October 2008

See also

• Duel
  • Duel (disambiguation)

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