"Mike Hansen" <[EMAIL PROTECTED]> writes:
[...]
| When trying to construct an object corresponding to 'Polynomial
| Fraction Integer' in Sage, you first want to construct the argument in
| Sage, and then make the polynomial ring over that. Currently, I'm
| just doing some simple string processing to extract the argument. It
| seems that all the data need to reconstruct a domain within FriCAS is
| present in its string representation; is this generally true?
In all AXIOM-based systems, the arguments used to instantiate a domain
are part of the domain object; you just need a function to access
them. In OpenAxiom, you use reify the domain object (a vector) into
a ConstructorCall and ask for the arguments.
|
| > In Aldor, Polynomial would be just any function, i.e., a first class object.
| > In FriCAS it's not, and it's on top of my whishlist to change that.
| > Unfortunately, I have no idea how to do it.
| >
| > Again, do you have a use case? Maybe there is a workaround.
|
| It'd be nice to be able to test given a random type if the "outermost"
| constructor is Polynomial. I'm just doing string stuff to work around
| it now, but perhaps there is another way to do this.
In OpenAxiom, constructorName gives you the name of the 'outermost',
e.g. the name (as a Symbol) of the constructor constructor. For
example, I have
(2) -> constructorName reify Polynomial Integer
(2) Polynomial
Type: Symbol
-- Gaby
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