As nouns the difference between dual and coend
is that dual
is dual while coend
is (mathematics) the dual of an end in category theory.
Exhibiting duality; characterized by having two (usually equivalent) components.
Acting as a counterpart.
(grammar) Pertaining to grammatical number (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the singular', '''plural''' and in some languages, ' trial grammatical number. Modern Arabic displays a dual number, as did Homeric Greek.
- dual-headed computer
Of an item that is one of a pair, the other item in the pair.
(geometry) Of a regular polyhedron with V'' vertices and ''F'' faces, the regular polyhedron having ''F'' vertices and ''V faces.
(grammar) dual number The grammatical number of a noun marking two of something (as in singular, dual, plural), sometimes referring to two of anything (a couple of', ' exactly two of ), or a chirality-marked pair (as in left and right, as with gloves or shoes) or in some languages as a discourse marker, "between you and me". A few languages display trial number.
(mathematics) 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 octahedron is the dual of the cube.
(mathematics) The dual of an end in category theory