Name( Arguments )  Function  Mod  Ref  
float()  as floating point number  M,O  

rat()  as exact number  M,O  
realpart()  realpart of  M,O  
imagpart()  imaginary part of  M,O  
abs()  absolute value of  M,O  
sign()  sign of  M,O  
conj()  conjugate complex  M,O  
angle()  angle of  M,O  
cfs( []) 

M,O  
primes(VAR)  VAR decomposed into primes  M,O 