Groundhog Day

Back in the Good Old Days of E8 theories, when I first met Corinne Manogue and Tevian Dray, they began their construction of a model by putting the Lorentz group (in the form Spin(3,1)) in the middle of Spin(12,4), leaving Spin(9,3) which they split into Spin(6)=SU(4) and Spin(3,3)=SL(4,R). Now if you take the compact part […]