The projective general unitary group 
is the group obtained from
the general unitary group 
on factoring the scalar matrices
contained in that group.
Projective General Unitary Group
See also
General Unitary Group, Projective General Linear Group, Projective General Orthogonal GroupExplore with Wolfram|Alpha
References
Conway, J. H.; Curtis, R. T.; Norton, S. P.; Parker, R. A.; and Wilson, R. A. "The Groups
, 
, 
, and 
." §2.2 in Atlas
of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups.
Oxford, England: Clarendon Press, p. x, 1985.Referenced on Wolfram|Alpha
Projective General Unitary GroupCite this as:
Weisstein, Eric W. "Projective General Unitary Group." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ProjectiveGeneralUnitaryGroup.html