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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: declaring variables
Replies: 3   Last Post: Sep 16, 1996 10:33 PM

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Burkhardt Goedde

Posts: 1
Registered: 12/7/04
declaring variables
Posted: Sep 5, 1996 1:48 AM
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Dear math users,
just a simple problem, but I got no answer from thew book.

Re[x + I y] gives

Re[x + I y]

whereas

Re[2 + 3 I]

gives 2

How could I tell Mathematica that x and y are real numbers?

thanks
burkart


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