spielwiese
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Last change
on this file since a7efa79 was
a7efa79,
checked in by Hans Schönemann <hannes@…>, 17 years ago
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*hannes: new book version
git-svn-id: file:///usr/local/Singular/svn/trunk@10182 2c84dea3-7e68-4137-9b89-c4e89433aadc
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-
Property mode set to
100644
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File size:
617 bytes
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| 1 | LIB "tst.lib"; |
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| 2 | tst_init(); |
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| 3 | |
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| 4 | ================================ example 1.9.34 ============================ |
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| 5 | |
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| 6 | LIB "gkdim.lib"; |
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| 7 | LIB "ncalg.lib"; |
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| 8 | def A = makeUsl(2); // set up U(sl_2) |
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| 9 | setring A; |
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| 10 | ideal I = e2,f; |
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| 11 | ideal LI = std(I); |
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| 12 | GKdim(LI); |
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| 13 | ideal TI = twostd(I); |
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| 14 | GKdim(TI); |
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| 15 | ideal Z = 4*e*f + h^2 - 4*h; |
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| 16 | Z = std(Z); |
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| 17 | GKdim(Z); |
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| 18 | ring B = 0,(a),dp; |
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| 19 | def C = A + B; |
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| 20 | setring C; |
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| 21 | ideal I = e^3, f^3, h^3-4*h, 4*e*f+h^2-2*h - a; |
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| 22 | I = std(I); |
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| 23 | GKdim(I); |
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| 24 | ideal J = eliminate(I,e*f*h); |
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| 25 | GKdim(J); |
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| 26 | setring A; |
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| 27 | resolution F = nres(LI,0); // we computed it before |
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| 28 | GKdim(F[1]); // this is LI itself |
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| 29 | GKdim(F[2]); |
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| 30 | GKdim(F[3]); |
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| 31 | |
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| 32 | tst_status(1);$ |
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| 33 | |
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