The proper way to handle this would, as you suggest, be to distinguish different kinds on infinities. Then, perhaps, countable infinity could be regarded as scheme:ish exact while infinities of higher cardinality would not (since scheme's handling of that kind of numbers is an approximation and, thus, not exact).

Den tis 28 sep. 2021 11:56Stefan Israelsson Tampe <stefan.itampe@gmail.com> skrev:

Then this does not work well

(fold min (inf) (list 1 2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 3 4))

which is a pity, we should have an exact inf as well

On Tue, Sep 28, 2021 at 10:32 AM <tomas@tuxteam.de> wrote:
On Tue, Sep 28, 2021 at 10:15:30AM +0200, Stefan Israelsson Tampe wrote:
> Why is (min (inf) 1) = 1.0 inexact?

Because inf's result is inexact. The same as (min 3 3.5) is inexact,
too.

It seems that the `inexactness' is contagious across arithmetic
generics (I haven't found an explicit place in the Guile docs;
the racket docs are more explicit about that).

Cheers
- t