On Dec 4, 5:40 am, "Stephen C. Gilardi" <[EMAIL PROTECTED]> wrote:
> I agree. By the identity element argument, (/) should be 1 and (-)
> should be 0.
>
Regarding *the* identity argument, I think it only works if the
operator is associative. Otherwise, you can talk about a left identity
or a right identity (if it exists). A right identity for op is an x so
that for all y: y op x = y. The left identity is an x so that for all
y: x op y. Clojure seems to be using the 'right' identity argument ;-)
Anyway, another interpretation of '=' would be logical/set-theoretic:
(= o1 o2 ... on) means: for all x,y in {o1, ... ,on} . x = y.
Then (not= o1 o2 ... on) could just be (not (= o1 o2 ... on)).
Then (=) would be true and (not=) would be false.
Kind Regards,
- Karl
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