Pin group
Lie group, completing a commutative square relating the orthogonal group, special orthogonal group, and spin group
en-US/ˈpɪn ˈɡɹup/
en-GB/ˈpɪn ˈɡɹuːp/
Lie group, completing a commutative square relating the orthogonal group, special orthogonal group, and spin group