ID: 6.0 Parent: 5.0 Tree
PDER
VAR\IND x1 x7^2*x8-x6 x7 x8
x1 1 0 0 0
x6 0 -1 2*x8*x7 x7^2
x7 0 0 1 0
x8 0 0 0 1
FOCUS
x1^3*x6-x7^2*x1^3*x8
DEPempty
MAP
x1 x1
x2 x6*x1
x3 x7*x1
x4 x8*x1
IMAP
x1 x1
x6 x2/x1
x7 x3/x1
x8 x4/x1
STACK
WBO (dim: 4)
J
-1 0
c 0
Nempty
(E,a)
Ea
x1 2
x7^2*x8-x6 0
C empty