Exhibiting duality.
Characterized by having two (usually equivalent) components.
Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
Being the space of all linear functionals of (some other space).
Pertaining to two, pertaining to a pair of.
To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.
Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
The dual number.
Of an item that is one of a pair, the other item in the pair.
Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
Pluralistic.
Consisting of or containing more than one of something.
In systems of number, not singular or not singular or dual.
A person with some form of multiplicity, particularly dissociative identity disorder.
The plural number. In English, referring to more or less than one of something.
A word in the form in which it potentially refers to something other than one person or thing; and other than two things if the language has a dual form.