An incompatibility theorem
Volume 48 / 1984
                    
                    
                        Colloquium Mathematicum 48 (1984), 135-138                    
                                        
                        DOI: 10.4064/cm-48-1-135-138                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            