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res6.m2
-- Date: Thu, 27 Nov 1997 04:11:50 +0100 (MET) -- To: dan@math.uiuc.edu -- Subject: Crash -- -- Dear Dan, The Macaulay2 code in the next letter crashes -- on the alpha machine sophie but works well on other platforms. -- Best regards -- Jan-Erik -- -- -- -- R=ZZ/101[a..t]; -- N=genericMatrix(R,a,4,5); -- J=minors(3,N); -- Q=R/J; -- M=coker vars Q; -- time betti res (M,Strategy=>2,LengthLimit=>3) -- time betti res (M,Strategy=>2,LengthLimit=>4) -- time betti res (M,Strategy=>2,LengthLimit=>5) -- time betti res (M,Strategy=>2,LengthLimit=>6) -- -- hmm, these use a LOT of memory and time, so I've commented them out R=ZZ/101[vars(0..5)] N=genericMatrix(R,a,2,3); J=minors(2,N); Q=R/J; M=coker vars Q; time betti res (M,Strategy=>3,LengthLimit=>4) === new BettiTally from { (2,{2}) => 18, (3,{3}) => 40, (0,{0}) => 1, (4,{4}) => 81, (1,{1}) => 6} R=QQ[vars(0..5)] N=genericMatrix(R,a,2,3); J=minors(2,N); Q=R/J; M=coker vars Q; time betti res (M,Strategy=>3,LengthLimit=>4) === new BettiTally from { (2,{2}) => 18, (3,{3}) => 40, (0,{0}) => 1, (4,{4}) => 81, (1,{1}) => 6} end R=ZZ/101[a..t, MonomialSize=>8]; N=genericMatrix(R,a,4,5); J=minors(3,N); Q=R/J; M=coker vars Q; time betti res (M,Strategy=>2,LengthLimit=>3) time betti res (M,Strategy=>3,LengthLimit=>4) time betti res (M,Strategy=>2,LengthLimit=>5) time betti res (M,Strategy=>2,LengthLimit=>6) -- Local Variables: -- compile-command: "make -C $M2BUILDDIR/Macaulay2/packages/Macaulay2Doc/test res6.out" -- End: