Hi friends,
here is a paper from a book, which partiell diff equation I would like to solve with MathCAD or Mathematica or Maple. WHo can help? Thanks  a lot spending your time.  here is the PDF File with the paper

Download 10402_Massequ_MathCadCompare_v2.pdf
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Sorry but my question os more for mathematica users: The DSolve result is not correct. What can I do?

Thanks for your advice.

Walter

Dear Experts,

I want to solve 2 workssheets with NPL Solve with Maple 12.

But how is it done? In worksheet 1 I always get this error. Unless I have solved this worksheet one err I can not continue wrking on worksheet two.

Thnaks for help

Walter

Dear Experts,

I got a warning with this sheet. I did a calculation in MathCAD11 without a warning - but with Levenberg-MArquardt. This method is missing in Maple12. How can I solve this fitting problem with Maple12 without a warning? Thanks in advanced.