|Bill Allombert on Sun, 08 Jun 2008 22:17:36 +0200|
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|Re: integer n-roots like sqrtint()|
On Tue, Feb 05, 2008 at 10:29:46AM +0100, Bill Allombert wrote: > On Tue, Feb 05, 2008 at 08:31:27AM +0100, Jeroen Demeyer wrote: > > I'm wondering if this can be considered a bug in PARI. Do you think it > > Well, sqrtn could be slightly more accurate since 6. is exactly > representable. > > > makes sense to change the implementation of sqrtn() to first call > > ispower() when the argument is an exact integer? > > If we improve sqrtn accuracy we should do it for all input, not just > perfect powers. And indeed Karim did just that in revision 10203 and now we get ? \p100 realprecision = 105 significant digits (100 digits displayed) ? floor(sqrtn(6^3,3)) %1 = 6 Cheers, Bill.