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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | --Copyright The Numerical Algorithms Group Limited 1991.
--Cyclohexan
mfzn : SQMATRIX(6,DMP([x,y,z],Fraction INT)) :=_
[[0,1,1,1,1,1],[1,0,1,8/3,x,8/3],[1,1,0,1,8/3,y],_
[1,8/3,1,0,1,8/3],[1,x,8/3,1,0,1],[1,8/3,y,8/3,1,0]]
fzn := determinant mfzn
mfxn : SQMATRIX(6,DMP([x,y,z],Fraction Integer)) :=_
[[0,1,1,1,1,1],[1,0,1,8/3,y,8/3],[1,1,0,1,8/3,z],_
[1,8/3,1,0,1,8/3],[1,y,8/3,1,0,1],[1,8/3,z,8/3,1,0]]
fxn := determinant mfxn
mfyn : SQMATRIX(6,DMP([x,y,z],Fraction Integer)) :=_
[[0,1,1,1,1,1],[1,0,1,8/3,z,8/3],[1,1,0,1,8/3,x],_
[1,8/3,1,0,1,8/3],[1,z,8/3,1,0,1],[1,8/3,x,8/3,1,0]]
fyn := determinant mfyn
gb := groebnerFactorize [fxn,fyn,fzn]
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