g1 g2 g3 g4 g5 g6 g7 g8 g9 g10 g11 g12 g13 g14 g15
z11/(2*z) 0 1/2 z 0 0 -4 (8*z)/z11 0 0 -1/2 z11 0 1/(4*z) (4*z)/z11
z12 0 0 1/(z*z12) 0 0 0 0 z 0 0 2/z z12 0 0
z13 0 0 1/(z*z13) 0 0 0 0 z 0 0 2/z z13 0 0
z14/(2*z) 0 1/2 z 0 0 0 0 2/z14 0 -1/2 z14 0 1/(4*z) 0
