
* Which problems do arise within relativistic enhancements of the Schr?dinger theory, especially if one adheres to the usual one-particle interpretation? * To what extent can these problems be overcome? * What is the physical necessity of quantum field theories? In many textbooks,...

* Which problems do arise within relativistic enhancements of the Schr?dinger theory, especially if one adheres to the usual one-particle interpretation?* To what extent can these problems be overcome? * What is the physical necessity of quantum field theories?In many textbooks,...

* Which problems do arise within relativistic enhancements of the Schr?dinger theory, especially if one adheres to the usual one-particle interpretation? * To what extent can these problems be overcome? * What is the physical necessity of quantum field theories? In many textbooks,...