integrate(log(1+(1+x**2)**0.5), x) -> incorrect result

• Subject: integrate(log(1+(1+x**2)**0.5), x) -> incorrect result
• From: Robert Dodier
• Date: Sat, 29 Nov 2008 08:38:03 -0700

On 11/29/08, Raymond Toy <toy.raymond at gmail.com> wrote:

>  One obvious workaround is to rationalize the expression before calling
>  rischint so that it never has to deal with float numbers.

I don't understand the Risch code either, but it seems unsurprising
that it mishandles floats; I'm in agreement with the suggestion here
to rationalize expressions before handing them over to RISCHINT.

FWIW

Robert Dodier

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