On 02/10/2015 01:14 AM, Waldek Hebisch wrote: > (3) -> st: Stream K := repeating([1,2,3]) >> >> _____ >> (3) [1,2,3]
> AFAICS series is fine, the problem is with printing: by default > coercion to OutputForm tries to print all known coefficients of > the series. Hmm. Strange. I came to the same conclusion that printing must be the problem, but then why didn't I run into the same problem with st: Stream K := repeating([1]) The stopping criteria here... https://github.com/fricas/fricas/blob/master/src/algebra/pscat.spad#L291 for n in (count + 1).. while explicitEntries? uu and _ not eq?(uu, rst uu) repeat obviously only tests for cycles of length 1. First of all, doesn't the default showAll?() == true look a bit dangerous? In fact, the problem with my example wouldn't have been there if showAll?() would be false. > We probably should change this default, to > only show fixed number of coefficients. The variable _$streamCount$Lisp is 10 in my case. So that would actually be fine. There is also a variable _$streamsShowAll$Lisp. Which is false by default (comes from ")set streams showall off"). I would have expected that infinite series respect this variable. But that's seemingly not the case. My suggestion would be to have at least showAll?() == NULL(_$streamsShowAll$Lisp)$Lisp => false true defined everywhere instead of simply setting it to true. (Actually, there should be a proper interface. I wouldn't want to see "$Lisp".) But even then the user must be warned when dealing with cyclic streams. I've no idea how this should be done, but letting the user blindly run into exausted memory isn't the best idea. Ralf -- 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.
