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Newby Q: How to specify reals

  • To: mathgroup at smc.vnet.net
  • Subject: [mg110511] Newby Q: How to specify reals
  • From: DBird <dbird at ieee.org>
  • Date: Tue, 22 Jun 2010 07:00:12 -0400 (EDT)

Trying the following procedure:

In[41]:= {T1, T2, C1, C2, R1, R2, w} \[Element] Reals

Out[41]= (T1|T2|C1|C2|R1|R2|w)\[Element]\[DoubleStruckCapitalR]

In[42]:= x = R1 + I 1/(w C1)

Out[42]= R1+I/(C1 w)

In[43]:= Im[x]

Out[43]= Re(1/(C1 w))+Im(R1)

Question is, how do I specify the list {T1,T2,...} such that Im[x]
yield just R1.

I usually find I am missing something dumb...

Thanks,

Dave


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