Projective Special Orthogonal Group
The projective special orthogonal group 
is the Group obtainedfrom the Special Orthogonal Group 
on factoring by the Scalar Matrices contained in that Group. Ingeneral, this Group is not Simple.
References
Conway, J. H.; Curtis, R. T.; Norton, S. P.; Parker, R. A.; and Wilson, R. A. ``The Groups 
, , 
, and , and 
.'' §2.4 in Atlas of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups. Oxford, England: Clarendon Press, pp. xi-xii, 1985.
- Gomory's Theorem
- Gompertz Constant
- Gompertz Curve
- Gonal Number
- Goodman's Formula
- Good Path
- Good Prime
- Goodstein Sequence
- Goodstein's Theorem
- Googol
- Googolplex
- Gordon Function
- Gorenstein Ring
- Gosper Island
- Gosper's Algorithm
- Gosper's Method
- Graceful Graph
- Graded Algebra
- Gradian
- Gradient
- Gradient Four-Vector
- Gradient Theorem
- Graeco-Latin Square
- Graeco-Roman Square
- Graeffe's Method