Homonym: dual (Dualism)
The term "dual" refers to something that consists of two parts or elements. It can describe various concepts, such as a dual citizenship, where an individual holds citizenship in two countries, or a dual-core processor, which has two processing units to enhance performance in computers.
In mathematics, "dual" often relates to duality, where two different perspectives or structures can represent the same concept. For example, in geometry, the dual of a polygon is a polyhedron, illustrating how two-dimensional shapes can correspond to three-dimensional forms.