Elementary Functions of a Complex Variable
In the preceding chapters we studied complex numbers from an algebraical point of view, coupled with geometrical interpretations, and this enabled us to arrive at a sensible and consistent definition of powers z r , where r is an integer. We also discussed fractional powers and their many-valuedness. Thus we are in the position to handle expressions like (z1/2 +2z-5)/(3z 2 + i), in which several such powers are combined.
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