In mathematics, the coset construction (or GKO construction) is a method of constructing unitary highest weight representations of the Virasoro algebra, introduced by Peter Goddard, Adrian Kent and David Olive (1986).
The method of constructing unitary highest weight representations of the Virasoro algebra, known as coset formation or GKO construction, was first proposed by Peter Goddard, Adrian Kent, and David Olive in 1986.