Cartan #0:
split: 1; compact: 4; complex: 0
canonical twisted involution: e
twisted involution orbit size: 5; fiber size: 16; strong inv: 80
imaginary root system: D4
real root system is empty
complex factor: A1
real form #2: [0,2,5] (3)
real form #1: [1,3,4,6] (4)
real form #0: [7] (1)