duality

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English[edit]

Etymology[edit]

From Latin duālitās.

dual +‎ -ity

Pronunciation[edit]

Noun[edit]

duality (plural dualities)

  1. A classification into two subclasses or opposed parts.
  2. (projective geometry) The interchangeability of points and planes.
  3. (mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

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