Please review
https://trac.sagemath.org/ticket/21754

On Monday, October 24, 2016 at 8:44:35 AM UTC+2, vdelecroix wrote:
>
> On 24 October 2016 at 08:33, Ralf Stephan <[email protected] <javascript:>> 
> wrote: 
> > On Monday, October 24, 2016 at 8:03:37 AM UTC+2, vdelecroix wrote: 
> >> 
> >> Something like this. But then it is not possible to do anything with 
> >> this expression (like numerical approximation)... 
> > 
> > 
> > Since you say pow is special we can fix this for the special case 
> > exponent in QQbar. Useful? 
>
> It would be useful to fix it in general: a real number power a 
> positive real number is something that is always well defined. And 
> actually, the following does work 
>
> sage: a = SR(2) ^ cos(3) 
> sage: a 
> 2^cos(3) 
> sage: a.numerical_approx() 
> 0.503480393603062 
>

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