10#include "qwt_transform.h" 
   90    return std::log( value );
 
 
   99    return std::exp( value );
 
 
  123    m_exponent( exponent )
 
 
  139        return -std::pow( -value, 1.0 / m_exponent );
 
  141        return std::pow( value, 1.0 / m_exponent );
 
 
  152        return -std::pow( -value, m_exponent );
 
  154        return std::pow( value, m_exponent );