x_1-x_2-Ebene

x_1-x_3-Ebene

x_2-x_3-Ebene

S_{12}

S_{13}

S_{23}

S_{12}

S_{13}

S_{23}

E12: z = 0
E13: y = 0
E23: x = 0
a = true
b = true
c = true
S12: g(-3)
S13: g(-1)
S23: g(1)
d = true
e = true
f = true