| Subject: | bsqrt() precision and rounding |
| Date: | Sat, 08 Oct 2011 11:40:13 +1100 |
| To: | bug-Math-BigRat [...] rt.cpan.org |
| From: | Kevin Ryde <user42 [...] zip.com.au> |
The docs of BigRat bsqrt() could say how much accuracy it gives and
which way it rounds. Does it end up a hard limit of 40 digits of some
such (a default from BigFloat maybe)?
If the input is a perfect square it'd be good to give back the exact
root. Not sure what to do otherwise, though perhaps rounding downwards,
to whatever precision denominator, would be consistent with BigInt.