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:
595 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 B.6.12 ================== |
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| 5 | |
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| 6 | ring R=0,(x,y),dp; |
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| 7 | poly f=3x2y+4xy2+y3+3x2+6xy+y2+3x; |
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| 8 | poly g=2x2y+xy2-y3-2x2-y2-2x; |
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| 9 | |
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| 10 | ring S=(0,y),x,dp; |
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| 11 | poly f=imap(R,f); poly g=imap(R,g); |
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| 12 | f; |
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| 13 | g; |
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| 14 | |
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| 15 | ring T1=5,x,dp; |
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| 16 | map phi=R,x,0; |
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| 17 | poly f=phi(f); poly g=phi(g); |
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| 18 | f; |
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| 19 | g; |
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| 20 | |
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| 21 | ring T2=7,x,dp; |
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| 22 | map psi=R,x,0; |
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| 23 | poly f=psi(f); poly g=psi(g); |
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| 24 | f; |
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| 25 | g; |
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| 26 | |
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| 27 | setring T1; |
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| 28 | phi=R,x,2; |
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| 29 | f=phi(f); g=phi(g); //we substitute y by 2 |
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| 30 | gcd(f,g); |
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| 31 | |
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| 32 | setring T2; |
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| 33 | psi=R,x,2; |
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| 34 | f=psi(f); g=psi(g); |
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| 35 | gcd(f,g); |
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| 36 | |
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| 37 | setring R; |
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| 38 | gcd(f,g); //the SINGULAR built-in function |
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| 39 | |
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| 40 | tst_status(1);$ |
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| 41 | |
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