MathGroup Archive 1998

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Re: Re[a + I b] = a (Markus Hetzenecker) writes:

>how can I tell mathematica that the variable a and b is real, so that
>Re[a+ I  b] results to a?

This is only correct if a and b are real. Try Re[a + I b] //

Hans Friedrich Steffani
Hans Friedrich Steffani
Institut fuer Elektrische Maschinen und Antriebe, TU Chemnitz

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