fieker-DuValspielwiese
Last change
on this file since 67242b was
362fc67,
checked in by Martin Lee <martinlee84@…>, 12 years ago
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chg: remove $Id$
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Property mode set to
100644
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File size:
661 bytes
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1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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2 | |
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3 | #include "config.h" |
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4 | |
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5 | #include "cf_assert.h" |
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6 | |
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7 | #include "cf_defs.h" |
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8 | #include "canonicalform.h" |
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9 | #include "cf_algorithm.h" |
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10 | #include "cf_random.h" |
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11 | |
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12 | static bool |
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13 | is_irreducible ( const CanonicalForm & f ) |
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14 | { |
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15 | CFFList F = factorize( f ); |
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16 | return F.length() == 1 && F.getFirst().exp() == 1; |
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17 | } |
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18 | |
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19 | CanonicalForm |
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20 | find_irreducible ( int deg, CFRandom & gen, const Variable & x ) |
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21 | { |
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22 | CanonicalForm result; |
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23 | int i; |
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24 | do { |
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25 | result = power( x, deg ); |
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26 | for ( i = deg-1; i >= 0; i-- ) |
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27 | result += gen.generate() * power( x, i ); |
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28 | } while ( ! is_irreducible( result ) ); |
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29 | return result; |
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30 | } |
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