int q = this->GetNumberOfHarmonics( );
typename Self::const_iterator i = this->begin( );
for( int l = -q; i != this->end( ); ++i, ++l )
int q = this->GetNumberOfHarmonics( );
typename Self::const_iterator i = this->begin( );
for( int l = -q; i != this->end( ); ++i, ++l )