spielwiese
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Last change
on this file since a6e7454 was
a6e7454,
checked in by Viktor Levandovskyy <levandov@…>, 20 years ago
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nontrivial examples from Plural doc
git-svn-id: file:///usr/local/Singular/svn/trunk@6653 2c84dea3-7e68-4137-9b89-c4e89433aadc
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File size:
462 bytes
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| 1 | // simple elimination tests |
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| 2 | LIB "tst.lib"; |
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| 3 | tst_init(); |
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| 4 | ring r=0,(e,f,h,a),Dp; |
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| 5 | matrix d[4][4]; |
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| 6 | d[1,2]=-h; |
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| 7 | d[1,3]=2*e; |
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| 8 | d[2,3]=-2*f; |
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| 9 | system("PLURAL",1,d); |
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| 10 | // it is U(sl_2)+K[a] |
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| 11 | option(redSB); |
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| 12 | option(redTail); |
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| 13 | poly p=4*e*f+h^2-2*h-a; |
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| 14 | // this is central element with parameter |
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| 15 | ideal I=e^3,f^3, h^3-4*h,p; |
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| 16 | ideal J=eliminate(I,efh); |
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| 17 | // this will give us the central character of I |
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| 18 | J; |
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| 19 | eliminate(I,h); // [e,f] is not the adm. subalgebra! |
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| 20 | eliminate(I,a); |
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| 21 | tst_status(1);$ |
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