selfdual
Self-dual, or selfdual, is an adjective used in various fields to describe an object that is, in a suitable sense, equivalent to its dual. The meaning of duality depends on context, but common uses involve a dual object constructed from the original one, such as a dual vector space, a dual graph, or a dual code.
In linear algebra and representation theory, a finite-dimensional vector space V over a field with a nondegenerate
In differential geometry and gauge theory, duality often refers to the Hodge star operator on differential
In combinatorics and geometry, a graph is self-dual if its dual graph is isomorphic to the original.
Self-duality thus denotes a deep symmetry between an object and its dual, across algebra, geometry, combinatorics,