John Cowan writes:

> [big snip] there are 49 Schemes I've investigated on this point: 17
> Schemes have both exact and inexact complex numbers, 8 have inexact
> complex numbers only, 1 has exact complex numbers only, 23 have no
> complex numbers.  I've counted plain Chicken and Chicken+numbers
> separately for this purpose.

I doubted the usefulness of exact complex numbers - wouldn't they be
manipulated in ways that produce inexact results anyway - but then I
realized/found out that they exist in number theory as "Gaussian
integers" and "Gaussian rationals" and are of some interest as such.

So, if I may, I vote 1) yes 2) yes for requiring exact rational
arithmetic, and 3) yes 4) yes for requiring complex numbers, both
exact and inexact.

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