I find the behaviour of constants rather inconsistent. And it's odd that %e::Float doesn't work, but %e+0::Float (and any other arithmetic involving %e) does. Also, the Euler-Mascheroni constant should be in there!
-Alasdair On 24 May 2007 20:09:32 +0200, Martin Rubey <[EMAIL PROTECTED]> wrote:
"Sumant S.R. Oemrawsingh" <[EMAIL PROTECTED]> writes: > I just find this very strange: > (1) -> %e > > (1) %e > Type: Expression Integer > (2) -> %pi > > (2) %pi > Type: Pi > > Why is %e of type Expression Integer, while %pi is of type Pi? Is there some > deeper reason why Pi is its own type? For some reasons, the original developers of axiom found %pi more important than %e. For elements of Expression Integer there is no direct conversion to Float, so they created an own domain HackPi, which contains only %pi and the necessary conversion functions. The didn't want to do the same thing with %e though: (2) -> %e::Float Cannot convert from type Expression Integer to Float for value %e In my opinion, we should have a domain for "general" constants, i.e., like Expression Integer but without variables, and, more generally, a domain for expressions with a given set of variables, similar to MPOLY. But I guess, that's a fair bit of work. Martin _______________________________________________ Axiom-mail mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/axiom-mail
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