e/Spin(7)-manifold

Information
has gloss	eng: In mathematics, a Spin(7)-manifold is an eight-dimensional Riemannian manifold with the exceptional holonomy group Spin(7). Spin(7)-manifolds are Ricci-flat and admit a parallel spinor. They also admit a parallel 4-form which is a calibrating form for a special class of submanifolds called Cayley cycles. The deformation theory of such submanifolds was first investigated by R. McLean.
lexicalization	eng: Spin(7) manifold
lexicalization	eng: Spin(7)-manifold
instance of	c/Structures on manifolds