On Aug 21, 2008, at 8:08 AM, Bill Page wrote:

>
> On Thu, Aug 21, 2008 at 12:50 AM, mhampton wrote:
>>
>> I really need to go to sleep so I won't do a top-ten, but here's a
>> top 2:
>>
>> 1) Powerful substitutions and rules.  Sage does not have anything
>> comparable.  The .subs() function is buggy even in its limited
>> domain.  There have been previous posts on sage-devel that give
>> good  examples of this.
>>
>
> Because of the subject of this thread I feel justified in giving the
> following examples from Axiom:
>
> http://axiom-wiki.newsynthesis.org/ManipulatingExpressions
>
> Perhaps Sage can implement some form of pattern matching and
> subsitution such is done by Axiom's rewrite rules? I think that in
> many respects these provide a functionality similar to Mathematica.
>
> There is also a similar re-writing system in Maple (applyrule).

I believe patter matching is something that GiNaC will get for us.

- Robert


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