Isometries of normed spaces
Tom 92 / 2002
                    
                    
                        Colloquium Mathematicum 92 (2002), 153-154                    
                                        
                        MSC: Primary 46B04.                    
                                        
                        DOI: 10.4064/cm92-1-13                    
                                    
                                                Streszczenie
We improve the Mazur–Ulam theorem by relaxing the surjectivity condition.