fieker-DuValspielwiese
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Last change
on this file since a1ef3a2 was
f16c7da,
checked in by Oleksandr Motsak <motsak@…>, 12 years ago
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fix the test Manual/laguerre_solve.tst to work in SW and legacy Singular
CHG: in the legacy Singular (real, ??, i) is a (real) complex (!) field with parameter i (but not in SW!?)
TODO: needs to be clarified in documentation!!!
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-
Property mode set to
100644
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File size:
627 bytes
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| 1 | LIB "tst.lib"; tst_init(); |
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| 2 | LIB "solve.lib"; |
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| 3 | // Find all roots of an univariate polynomial using Laguerre's method: |
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| 4 | ring rs1= 0,(x,y),lp; |
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| 5 | poly f = 15x5 + x3 + x2 - 10; |
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| 6 | // 10 digits precision |
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| 7 | laguerre_solve(f,10); |
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| 8 | // Now with complex coefficients, |
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| 9 | // internal precision is 30 digits (default) |
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| 10 | printlevel=2; |
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| 11 | ring rsc= (complex,10,i),x,lp; |
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| 12 | poly f = (15.4+i*5)*x^5 + (25.0e-2+i*2)*x^3 + x2 - 10*i; |
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| 13 | list l = laguerre_solve(f); |
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| 14 | l; |
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| 15 | // check result, value of substituted polynomial should be near to zero |
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| 16 | // remember that l contains a list of strings |
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| 17 | // in the case of a different ring |
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| 18 | subst(f,x,l[1]); |
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| 19 | subst(f,x,l[2]); |
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| 20 | tst_status(1);$ |
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