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Topic: Another question about Factor
Replies: 13   Last Post: Nov 23, 2012 6:11 PM

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Richard Fateman

Posts: 1,406
Registered: 12/7/04
Re: Another question about Factor
Posted: Nov 23, 2012 6:11 PM
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Dear Tang Laoya

1. Rearranging expressions so that they require the fewest number of
operations is generally far less important than to evaluate them
so that the calculation is numerically accurate.
2. There are programs that attempt to optimize (rearrange) the
evaluation of expressions. In Maxima, there is a command "optimize".
Also, most FORTRAN compilers try to do this.
3. There is no uniform procedure that will work in all cases.
4. You could learn a lot about this problem by using Google.
5. Some people consider it impolite to post hundreds of lines
of a pretty much random program.




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