That in Python one has non-real value for (-1)**(1/3) is 
two things: 1/3 is actually a float, and absence of typing. 
These are artifacts of the programming language, and make little sense 
mathematically.


Do you mean that the value of (-1)**(1/3) is arbitrarily chosen, regardless 
of the mathematical value of (-1)^(1/3)? 

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