Function bCommonDen

factory/cf_algorithm.cc:292–305

CanonicalForm bCommonDen ( const CanonicalForm & f ) * * * bCommonDen() - calculate multivariate common denominator of * coefficients of `f'. * * The common denominator is calculated with respect to all * coefficients of `f' which are in a base domain. In other * words, common_den( `f' ) * `f' is guaranteed to have integer * coefficients only. The common denominator of zero is one. *

 *
**/
CanonicalForm
bCommonDen ( const CanonicalForm & f )
{
    if ( getCharacteristic() == 0 && isOn( SW_RATIONAL ) )
    {
        // otherwise `bgcd()' returns one
        Off( SW_RATIONAL );
        CanonicalForm result = internalBCommonDen( f );
        On( SW_RATIONAL );
        return result;
    }
    else
        return CanonicalForm( 1 );
}

/** bool fdivides ( const CanonicalForm & f, const CanonicalForm & g )
 *