Re: sqrtint for rationals

[James Wanless <james@grok.ltd.uk>]

Speaking of which, I _think_ I might have a solution for the Table- 
maker's dilemma:
Specifically, if one has available integers of any length already ie  
thru' GMP, then why can't one just use _perfectly correct_ rationals  
(described as two integers, top and bottom of a fraction) [a little  
bit akin to two-coordinate complex numbers].
I don't see why then one couldn't carry through rationals w/ perfect  
accuracy thru all operations... or is this already what is used in  
MPFR etc.???
J

On 14 Mar 2012, at 09:03, Andreas Enge wrote:

> Would it be easy to extend sqrtint to rationals? I need it in my  
> code and
> think I could implement it as floor (sqrt ()); but whether this  
> succeeds
> depends on the floating point precision.
>
> Andreas