Michael Somos on Sun, 29 Sep 2002 13:44:20 -0400

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Re: Precision lost in truncation

? \p
   realprecision = 28 significant digits
? for(n=26,29,print(n" "10.^n" "floor(10.^n)))
26 100000000000000000000000000.0 100000000000000000000000000
27 1000000000000000000000000000. 1000000000000000000000000000
28 10000000000000000000000000000. 10000000000000000000000000000
  ***   precision too low in mptrunc (precision loss in truncation).

The error message is telling you that the number you have is too
big to distinguish between x and floor(x). Increase the accuracy
of your computation in order to avoid this. Shalom, Michael

> very often I want to use floor(x) in my functions.
> Somtimes, it's ok; sometimes, I have an error:
> "tuncation lost etc.". How can I avoid it ?

Shalom, Michael