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[mathcad] Summary on complex solution with root function
| [mathcad] Summary on complex solution with root function |
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Author: Marc Artzrouni
Posted: Mon, 23 May 2005 09:30:29 +0200
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Many thanks for several interesting comments on a very small complex
part for the real root of a completely real equation. It is indeed
the case that due to rounding a very small complex number can appear
even if the arithmetic is supposed to be real. (for example if the
program needs to take the square root of a number that should really be
zero but is a tiny bit negative due to rounding). Jan's idea that
> there should be a way to throw a switch which declared that in a certain scope all computations are to be done strictly on the Reals.
>
seems like a good one to me. Dave Powley in his answer points out that
with Version 12.1 he did not encounter any of my problems (I use
something older called 2001i).
Again, thanks to all - This is a wonderful forum.
Marc Artzrouni
--
Marc Artzrouni
Département de Mathématiques (IPRA)
Université de Pau - BP 1155
64013 Pau Cedex
FRANCE
Home page/page perso:
http://www.univ-pau.fr/~artzroun/
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