Cartan #0:
split: 0; compact: 2; complex: 0
canonical twisted involution: e
twisted involution orbit size: 1; fiber size: 4; strong inv: 4
imaginary root system: B2
real root system is empty
complex factor is empty
real form #2: [0,2] (2)
real form #1: [1] (1)
real form #0: [3] (1)


Cartan #1:
split: 0; compact: 0; complex: 1
canonical twisted involution: 2,1,2
twisted involution orbit size: 2; fiber size: 1; strong inv: 2
imaginary root system: A1
real root system: A1
complex factor is empty
real form #2: [0] (1)


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


Cartan #3:
split: 2; compact: 0; complex: 0
canonical twisted involution: 2,1,2,1
twisted involution orbit size: 1; fiber size: 1; strong inv: 1
imaginary root system is empty
real root system: B2
complex factor is empty
real form #2: [0] (1)