On 5 April 2015 at 05:03, Ralf Hemmecke <[email protected]> wrote: > > In fact, in the long run, I would like to remove non-constructive > functions. Or at least adapt their specification. Equality of streams, > for example, is not computable in general. So Stream(X) should not > inherit from BasicType.
I think that that is an odd suggestion since equality in Expression is also not computable in general. > We can replace that with another function > > eq: (%, %) -> Union(Boolean, "failed") > > whose specification explicitly says that eq(x,y) might run forever or > return "failed", if the respective algorithm isn't able to decide about > equality. But that's for the future since it needs quite some thought > about what other part of FriCAS it affects. > Perhaps there is a need for some relations that are not just true or false in a some conventional closed-world Aristotelian logic sense. -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
