oh, just a note on precision in Maxima with bigfloats.

If you have 2 numbers of precision N  and M,  and you add them together, the
resulting number will be of precision K  where K is the global value of the
specified precision.  this is fpprec  [in decimal, approximately]   or 
?fpprec
in binary.

Thus the inherent precision of some number as input is maybe less important 
than
the global setting. 

RJF

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