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View File Name :
res7.m2
-- an old bug from Eisenbud kk=ZZ/32003 S=kk[a,b,c,d] m=map(S^2,S^{-1,-1},matrix{{a,b},{c,d}}) jm=jacobian m mt = transpose jm jn=gens kernel mt R=kk[A,B,C,D,SkewCommutative=>true] ev=map(R,S,matrix{{A,B,C,D}}) JN = ev jn q=vars(R)**id_(R^2) p=q*JN --The following line uses up all the memory; on my 64Mb machine --it begins swapping, doesn't finish before I give up. F=res(coker p, LengthLimit=>2) G=res(coker p, LengthLimit=>3) assert( apply(4,i->rank G_i) == {2, 6, 12, 20} ) end -- Local Variables: -- compile-command: "make -C $M2BUILDDIR/Macaulay2/packages/Macaulay2Doc/test res7.out" -- End: