spielwiese
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Last change
on this file since a7efa79 was
a7efa79,
checked in by Hans Schönemann <hannes@…>, 16 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:
568 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 1.9.25 =============================== |
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| 5 | |
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| 6 | LIB "ncalg.lib"; |
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| 7 | LIB "center.lib"; |
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| 8 | def A0 = makeUsl2(); // U(sl_2) over the rationals |
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| 9 | setring A0; |
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| 10 | // compute the centralizer of f^2 up to degree 6 |
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| 11 | ideal C = centralizer(f^2,6); C; |
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| 12 | ideal Z = center(5); Z; |
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| 13 | def A5 = makeUsl2(5); // U(sl_2) over Z/5Z |
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| 14 | setring A5; |
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| 15 | ideal Z = center(5); |
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| 16 | Z; |
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| 17 | |
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| 18 | // we are in the algebra A5 |
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| 19 | ideal T = twostd(4ef+h2-2h); |
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| 20 | T; |
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| 21 | qring Q = T; |
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| 22 | // compute the centralizer of f^2 up to degree 6 |
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| 23 | ideal C = centralizer(f^2,6); |
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| 24 | C; |
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| 25 | |
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| 26 | tst_status(1);$ |
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| 27 | |
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