duality

noun

A classification into two subclasses or opposed parts. / (projective geometry) The interchangeability of points and planes.

The concept of duality is prevalent in many philosophical and scientific theories.

意味（1）

A classification into two subclasses or opposed parts.

意味（2）

(projective geometry) The interchangeability of points and planes.

意味（3）

(mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.