Re: digits(n,-4)

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Sat, Oct 14, 2023 at 07:24:35PM +0200, Ruud H.G. van Tol wrote:
> 
> ? fromdigits( [1,3,0], -4 )
> % 4

Note that we do need to know that the set of digits is here.

> ? my(n=4, v=[]); while( n=divrem(n,-4), v=concat(n[2],v); n=n[1] ); v
> % [1, 3, 0]
> 
> Is there a better way to do this?

I would start with use digits(n,16) and split the digits.

> Should digits() be changed to support a negative base?

There are too many variants...

Cheers,
Bill.