On 12/07/2012 06:05 PM, Raymond Toy wrote:
>>>>>> "Vickram" == Vickram Ratnam <accts at goldox.mu> writes:
> Vickram> I?m trying to compute a definite integral using
> Vickram> Woollett?s tanh-sinh maxima code and the maxima built-in
> Vickram> integration methods but with no success!
>
> Vickram> My function is the following:
>
> Vickram> 1/sqrt((.0000812*(1+x)^4)+(.2719188*(1+x)^3)+(0*(1+x)^2)+.728)
>
> Vickram> From 0 to 1e+13
>
> Vickram> Using preferably tanh-sinh quadrature and to over 300 digits accuracy!
>
> I don't have a copy of Ted's tanh-sinh method handy, but what's the
> point of computing the integral to 300 digits when the numbers appear
> to have at most 7 digits of accuracy? If they are supposed to be
> exact, make them rationals.
It would be nice to know what the origin of these decimal numbers is.
Perhaps these aren't rationals and the user doesn't know how to
express their exact representations inside maxima. Just a guess.
Andre