The projective general unitary group is the Group obtained from the General Unitary Group on factoring the scalar Matrices contained in that group.
See also General Unitary Group, Projective General Linear Group, Projective General Orthogonal Group, Projective General Unitary Group
Conway, J. H.; Curtis, R. T.; Norton, S. P.; Parker, R. A.; and Wilson, R. A.
``The Groups , ,
.'' §2.2 in
Atlas of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups. Oxford, England:
Clarendon Press, p. x, 1985.