Difference between revisions of "HowTo:Randomize Coefficients"

From CoCoAWiki
(a function for "small" random polynomials)
 
Line 16: Line 16:
 
  2yz + 6x
 
  2yz + 6x
 
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by [[User:Bigatti|Bigatti]] 17:25, 29 Nov 2005 (CET)
 
[[Category:CoCoA4]] [[Category:HowTo]]
 
[[Category:CoCoA4]] [[Category:HowTo]]

Revision as of 18:25, 29 November 2005

Question

The coefficients of a "Randomized" polynomials are too big for my purposes

  Use R ::= Q[x,y,z];
  Randomized(x-yz);
2129104241yz - 2703411994x
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What can I do?

Answer

This function will produce a randomized polynomial with "small" random coefficients

  Define MyRandomized(F, Range)
    Return Sum([ Rand(-Range,Range)*T | T In Support(F)]);
  EndDefine;
  MyRandomized(x-yz, 4);
2yz + 6x
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by Bigatti 17:25, 29 Nov 2005 (CET)