From: Yosi Scharf <syosi@mit.edu>

Date: Thu, 25 Nov 2004 14:37:22 -0500

Message-ID: <41A63472.3080702@mit.edu>

To: jos.deroo@agfa.com

Cc: public-cwm-talk@w3.org

Date: Thu, 25 Nov 2004 14:37:22 -0500

Message-ID: <41A63472.3080702@mit.edu>

To: jos.deroo@agfa.com

Cc: public-cwm-talk@w3.org

I was trying out Euler. created the attached file (factorial.n3) running cwm factorial.n3 --think --data --purge gives me 0 :factorial 1 . 1 :factorial 1 . 2 :factorial 2 . 3 :factorial 6 . 4 :factorial 24 . 5 :factorial 120 . 6 a :Question; :factorial 720 . 720 a :Answer . I can't figure out how to get Euler to compute factorial for me. I try /usr/java/jdk1.5.0/bin/java Euler /home/syosi/program/factorial.n3 /home/syosi/program/q.n3 and it tells me # Generated with http://www.agfa.com/w3c/euler/ version R4043 on 25 Nov 2004 19:35:12 GMT @prefix log: <http://www.w3.org/2000/10/swap/log#>. (<file:/home/syosi/program/factorial.n3>.log:semantics).log:conjunction => { # No proof found for file:/home/syosi/program/q.n3 in 123 steps (453 steps/sec) using 1 engine (7 triples) }. No matter what I try, it tells me no proof found. What am I not doing? Yosi @prefix log: <http://www.w3.org/2000/10/swap/log#> . @prefix math: <http://www.w3.org/2000/10/swap/math#> . @prefix : <http://yosi.us/math#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . { ?x a :Number; math:equalTo 0 . } log:implies {?x :factorial 1 . } . { ?x a :Number . (?x -1) math:sum ?z . ?z :factorial ?a . (?a ?x) math:product ?y .} log:implies {?x :factorial ?y} . { ?x a :Number . (?x -1) math:sum ?z . ?z math:notLessThan 0} log:implies {?z a :Number} . {?x a :Question} log:implies {?x a :Number} . {?x a :Question; :factorial ?y . } log:implies {?y a :Answer . } . :Number a log:Chaff . 6 a :Question . @prefix : <http://yosi.us/math#> . _:x a :Answer .Received on Thursday, 25 November 2004 19:37:55 UTC

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