Statements (13)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | 
                                    
                                        
                                            gptkb:physics_formula
                                        
                                         | 
                            
| gptkbp:appliesTo | 
                                    
                                        
                                            gptkb:neutron
                                        
                                         gptkb:proton  | 
                            
| gptkbp:describes | 
                                    
                                        
                                            
                                            electromagnetic contribution to the proton-neutron mass difference
                                        
                                        
                                         | 
                            
| gptkbp:field | 
                                    
                                        
                                            
                                            nuclear physics
                                        
                                        
                                         | 
                            
| gptkbp:namedAfter | 
                                    
                                        
                                            gptkb:W._N._Cottingham
                                        
                                         | 
                            
| gptkbp:publishedIn | 
                                    
                                        
                                            gptkb:Physical_Review
                                        
                                         | 
                            
| gptkbp:relatedTo | 
                                    
                                        
                                            gptkb:quantum_chromodynamics
                                        
                                         | 
                            
| gptkbp:uses | 
                                    
                                        
                                            
                                            dispersion relations
                                        
                                        
                                         | 
                            
| gptkbp:year | 
                                    
                                        
                                            
                                            1963
                                        
                                        
                                         | 
                            
| gptkbp:bfsParent | 
                                    
                                        
                                            gptkb:W._N._Cottingham
                                        
                                         | 
                            
| gptkbp:bfsLayer | 
                                    
                                        
                                            
                                            6
                                        
                                        
                                         | 
                            
| https://www.w3.org/2000/01/rdf-schema#label | 
                                    
                                        
                                            
                                            Cottingham formula
                                        
                                        
                                         |