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simplify a long symbolic expression (sum of fractions)

ver din
Posted 11 years ago

Hello all, I am having a long complicated symbolic expression which is sum of fractions and complex in nature. Now I want to separate its real and imaginary parts and later solve these two parts (treating them two algebraic equations) for two unknowns. Mathematica is giving me one unknown in terms of second unknown (which is not expected). I think that I am unable to put original expression in simplified form. Please help me. Also by any mean can I translate the original expression into such a form so that it can be processed in Maple.

thanks in advance.
POSTED BY: ver din
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Bill Simpson
Bill Simpson
Posted 11 years ago
POSTED BY: Bill Simpson
ver din
ver din
Posted 11 years ago

Thanks Bill. Please find the attached notebook in rar file (since the size of notebook file is greater than 20 Mb). To open the attached file you have to rename the file with extension ".rar" (means rename the file with "complex_prob1.nb.rar" and then extract). Since I was not able to upload the .rar file hence I had to take that move. Please bear with me.

Now I want to solve the real and imaginary parts of Eq1 for Rdot and etadot.

Thanks in advance.

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POSTED BY: ver din

A start might be 

ComplexExpand[Re[ expression]]

where 

In[1]:= ?ComplexExpand
ComplexExpand[expr] expands expr assuming that all variables are real. ComplexExpand[expr, {x1, x2, …}]
      expands expr assuming that variables matching any of the x  are complex.
POSTED BY: Bruce Miller
Bill Simpson
Bill Simpson
Posted 11 years ago
POSTED BY: Bill Simpson
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