Pure spinor
In the domain of mathematics known as representation theory, pure spinors (or simple spinors) are spinors that are annihilated, under the Clifford algebra representation, by a maximal isotropic subspace of a vector space V {\displaystyle V} with respect to a scalar product Q {\displaystyle Q} . They were introduced by Élie Cartan in the 1930s and further developed by Claude Chevalley.