Hi Waldek:
Thanks. That is exactly what I want. Good solution. So the
"trick" is to use ' instead of the string. So is the
following a bug?
a:='Fraction::SEX
Fraction Type:SExpression
b:="Fraction"::SEX
Fraction Type:SExpression
(a=b)@Boolean
false Type Boolean
That is, I was deceived by the output which looked the same.
Perhaps the output should have been ('Fraction) and
("Fraction") ??
Also,
destruct(a) or destruct(b) leads to an Error:
Function Selection for destruct
Arguments: SEX
[1] signature: SEX -> LIST SEX
implemented: slot (List $)$ from SEX
>> Error detected within library code:
Non-list
protected-symbol-warn called with (NIL)
William
Waldek Hebisch wrote:
>
> William Sit wrote:
> > Gabriel:
> >
> > Thanks for the response. Your script shows how to get the
> > parameters, not the constructor. I do not have OpenAxiom
> > installed (sorry). The question is whether I can test that
> > the constructor is Fraction, or otherwise (like
> > FiniteField) when the domain belongs to the category
> > Field.
> >
>
> Do you want something like this?
>
> (10) -> a := Fraction(Integer)
>
> (10) Fraction Integer
> Type: Domain
> (11) -> (opOf(devaluate(a)$Lisp)$Lisp = 'Fraction::SEX)@Boolean
>
> (11) true
> Type: Boolean
> (12) -> (opOf(devaluate(a)$Lisp)$Lisp = 'FiniteField::SEX)@Boolean
>
> (12) false
> Type: Boolean
> (13) -> a :=FiniteField(5,2)
>
> (13) FiniteField(5,2)
> Type: Domain
> (14) -> (opOf(devaluate(a)$Lisp)$Lisp = 'Fraction::SEX)@Boolean
>
> (14) false
> Type: Boolean
> (15) -> (opOf(devaluate(a)$Lisp)$Lisp = 'FiniteField::SEX)@Boolean
>
> (15) true
> Type: Boolean
>
>
> --
> Waldek Hebisch
> [email protected]
>
> _______________________________________________
> Axiom-developer mailing list
> [email protected]
> http://lists.nongnu.org/mailman/listinfo/axiom-developer
--
William Sit
Department of Mathematics..Email: [email protected]
City College of New York................Tel: 212-650-5179
New York, NY 10031, USA.................Fax: 212-862-0004
Home page: .......http://scisun.sci.ccny.cuny.edu/~wyscc/
_______________________________________________
Axiom-developer mailing list
[email protected]
http://lists.nongnu.org/mailman/listinfo/axiom-developer
