- Member line< K >::operator!= (const line< K > &other) const  
 
- Check name of variables as well. 
 
 
- Member plane< K >::operator!= (const plane< K > &other) const  
 
- Check name of variables as well. 
 
 
- Member plane< K >::operator== (const plane< K > &other) const  
 
- Check name of variables as well.