Complex Power Operation: Is x^iy Possible?

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I am wondering whether complex power operation is valid.

For example, can 2i3 be calculated? Or is it undefined?

Thanks
 
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https://www.physicsforums.com/showthread.php?t=637214 .
 
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complex exponentiation is defined by

x^y:=e^(y log(x))
 

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