| General routines | 
| add() | add_apply() | addinvers() | 
| addinvers_apply() | comp() | copy() | 
| div() | einsp() | fprint() | 
| fprintln() | ganzdiv() | hoch() | 
| invers() | mod() | mult() | 
| mult_apply() | negp() | negeinsp() | 
| nullp() | objectread() | objectwrite() | 
| posp() | print() | println() | 
| scan() | tex() | 
| General routines |