spielwiese
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Last change
on this file since f58e95 was
f58e95,
checked in by Jens Schmidt <schmidt@…>, 27 years ago
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* canonicalform.h: declarations of functions from cf_factor.cc
removed. In all files which refer to these functions #include
of cf_algorithm.h added.
git-svn-id: file:///usr/local/Singular/svn/trunk@639 2c84dea3-7e68-4137-9b89-c4e89433aadc
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-
Property mode set to
100644
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File size:
700 bytes
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| 1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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| 2 | /* $Id: cf_irred.cc,v 1.3 1997-08-29 08:38:25 schmidt Exp $ */ |
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| 3 | |
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| 4 | #include <config.h> |
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| 5 | |
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| 6 | #include "assert.h" |
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| 7 | |
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| 8 | #include "cf_defs.h" |
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| 9 | #include "canonicalform.h" |
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| 10 | #include "cf_algorithm.h" |
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| 11 | #include "cf_random.h" |
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| 12 | |
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| 13 | static bool |
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| 14 | is_irreducible ( const CanonicalForm & f ) |
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| 15 | { |
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| 16 | CFFList F = factorize( f ); |
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| 17 | return F.length() == 1 && F.getFirst().exp() == 1; |
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| 18 | } |
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| 19 | |
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| 20 | CanonicalForm |
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| 21 | find_irreducible ( int deg, CFRandom & gen, const Variable & x ) |
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| 22 | { |
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| 23 | CanonicalForm result; |
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| 24 | int i; |
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| 25 | do { |
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| 26 | result = power( x, deg ); |
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| 27 | for ( i = deg-1; i >= 0; i-- ) |
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| 28 | result += gen.generate() * power( x, i ); |
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| 29 | } while ( ! is_irreducible( result ) ); |
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| 30 | return result; |
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| 31 | } |
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