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Minors changes to PencilsOfQuadrics to get it working again with Comp…
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…lexes
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mikestillman committed Nov 4, 2024
1 parent 06b4341 commit 3948508
Showing 1 changed file with 8 additions and 8 deletions.
16 changes: 8 additions & 8 deletions M2/Macaulay2/packages/PencilsOfQuadrics.m2
Original file line number Diff line number Diff line change
Expand Up @@ -3378,7 +3378,7 @@ doc ///
ann Ulr == ideal qs

elapsedTime Ulr3 = searchUlrich(M,S,3);
betti res Ulr3
betti freeResolution Ulr3
ann Ulr3 == ideal qs
Caveat
searchUlrich uses the method randomLineBundle, so the ground field kk has to be finite.
Expand Down Expand Up @@ -3556,11 +3556,11 @@ P = kk[drop(gens S, -2)]
qs = sub(diff(matrix{{S_(2*g+2), S_(2*g+3)}}, qq), P)
CI = P/ideal qs

F = res( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = res( coker transpose F.dd_3, LengthLimit => 5))
F = freeResolution( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = freeResolution( coker transpose F.dd_3, LengthLimit => 5))
M = cliffordModule(Mu1, Mu2, R)
betti (F1=cliffordModuleToCIResolution(M,S,CI))
betti (FFF = res coker FF.dd_5)
betti (FFF = freeResolution(coker FF.dd_5, LengthLimit => 5))
q1 = diff(S_(2*g+2),qq)
q2 = diff(S_(2*g+3),qq)
N = (S^1/(ideal(q1,q2))**coker sub(F.dd_2,S))
Expand All @@ -3576,8 +3576,8 @@ P = kk[drop(gens S, -2)]
qs = sub(diff(matrix{{S_(2*g+2), S_(2*g+3)}}, qq), P)
CI = P/ideal qs

F = res( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = res( coker transpose F.dd_3, LengthLimit => 5))
F = freeResolution( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = freeResolution( coker transpose F.dd_3, LengthLimit => 5))
M = cliffordModule(Mu1, Mu2, R)
betti (F1=cliffordModuleToCIResolution(M,S,CI))
assert(ideal F1.dd_(g+3-(g%2))_{0} ==ideal sub(u,CI))
Expand All @@ -3594,8 +3594,8 @@ P = kk[drop(gens S, -2)]
qs = sub(diff(matrix{{S_(2*g+2), S_(2*g+3)}}, qq), P)
CI = P/ideal qs

F = res( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = res( coker transpose F.dd_3, LengthLimit => 5))
F = freeResolution( coker (sub(u, CI)), LengthLimit => 3)
betti (FF = freeResolution( coker transpose F.dd_3, LengthLimit => 5))
M = cliffordModule(Mu1, Mu2, R)
betti (F1=cliffordModuleToCIResolution(M,S,CI))
assert(ideal F1.dd_(g+3-(g%2))_{0} ==ideal sub(u,CI))
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