Perhaps alphabetize the symbols to break the loop? It seems that something is needed or you'll get a combinatorical explosion of rules!
Also, you need some system to say writing (* 3 x) is preferable to (+ x x x) and the like. I have had good luck using an entropy based calculation for scoring such options in the past. Is there any way to incorporate such a score in the rule system? Alan On Wed, May 29, 2013 at 10:02 AM, Maik Schünemann <maikschuenem...@gmail.com > wrote: > Hi Alan. > Yes I looked at Mathematica even read a paper about its internal > implementation and that it is at its core basically a rewrite system! > (I also mentioned that in my proposal) > this commutative rule would cause an infinite loop because x and y match > to anything. So the result of applying the rule will be given to the rule > and on and on ... > This is a hard thing for rule based systems. > but I plan to have generic rules classes of operations. > > Thanks for your feedback > > > On Wed, May 29, 2013 at 6:21 PM, Alan Thompson <thompson2...@gmail.com>wrote: > >> Hi - This looks great! Did you look at Mathematica at all? They have >> been doing symbolic algebra for many years, and you might get some ideas >> there. >> >> Also, I noticed that you don't have any commutative rules listed, eg: >> >> (rule ['+ x y] :=> ['+ y x]) >> >> Wouldn't this reduce some of the duplication in your rules example? >> Good luck! >> Alan Thompson >> >> >> On Wed, May 29, 2013 at 8:29 AM, David Nolen <dnolen.li...@gmail.com>wrote: >> >>> A very cool of use of core.logic, look forward to seeing where it goes :) >>> >>> >>> On Wed, May 29, 2013 at 11:10 AM, Maik Schünemann < >>> maikschuenem...@gmail.com> wrote: >>> >>>> Hello, >>>> I am glad to announce that my proposal got accepted for google summer >>>> of code. >>>> I am doing the algebraic expression project idea which could lay the >>>> foundation for a clojure CAS System by providing a library to manipulate >>>> expressions syntactically >>>> and also solving equations and optimizing them for evaluation on top of >>>> core.matrix. >>>> >>>> I have created a blog post in which I explained it in more detail and >>>> also the design decisions I have to make in the beginning, such as how to >>>> represent an expression, >>>> a rule, how to deal with core.logic ... >>>> http://kimavcrp.blogspot.de/201blog >>>> post3/05/gsoc-project-algebraic-expressions-pre.html<http://kimavcrp.blogspot.de/2013/05/gsoc-project-algebraic-expressions-pre.html> >>>> >>>> Please comment if you have feedback or feature request or have a >>>> concrete use case for what you would want to use it. The more feedback I >>>> get the better I can make the >>>> library. >>>> >>>> >>>> -- >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To post to this group, send email to clojure@googlegroups.com >>>> Note that posts from new members are moderated - please be patient with >>>> your first post. >>>> To unsubscribe from this group, send email to >>>> clojure+unsubscr...@googlegroups.com >>>> For more options, visit this group at >>>> http://groups.google.com/group/clojure?hl=en >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to clojure+unsubscr...@googlegroups.com. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>>> >>>> >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clojure@googlegroups.com >>> Note that posts from new members are moderated - please be patient with >>> your first post. >>> To unsubscribe from this group, send email to >>> clojure+unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/clojure?hl=en >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to clojure+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >>> >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
