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Submitted by : kratt6 at: 2009-01-13T01:09:22-08:00 (8 years ago)
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Axiom Version :
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axiom
)expose RECOP
RecurrenceOperator is now explicitly exposed in frame initial GUESSRESULT ==> Record(function: EXPR INT, order: NNI)
Type: Void
axiom
f := operator 'f

\label{eq1}f(1)
axiom
-- Somos 4
s: INT -> INT;
Type: Void
axiom
s(0)==1; s(1)==1; s(2)==1; s(3)==1;
Type: Void
axiom
s(n)==(s(n-1)*s(n-3)+s(n-2)^2)/s(n-4);
Type: Void
axiom
getEq guessRec([s m for m in 0..18], maxPower==2).1.function-f(n)*f(n+4)-f(n+1)*f(n+3)-f(n+2)^2
axiom
Compiling function s with type Integer -> Integer
axiom
Compiling function s as a recurrence relation.
   There are 1 exposed and 1 unexposed library operations named elt 
      having 1 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                               )display op elt
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
Cannot find application of object of type Expression(Integer) to argument(s) of type(s) Variable(function)
getEq guessRec([s n for n in 0..18], maxPower==2).1.function-f(n)*f(n+4)-f(n+1)*f(n+3)-f(n+2)^2
There are 1 exposed and 1 unexposed library operations named elt having 1 argument(s) but none was determined to be applicable. Use HyperDoc Browse, or issue )display op elt to learn more about the available operations. Perhaps package-calling the operation or using coercions on the arguments will allow you to apply the operation.
Cannot find application of object of type Expression(Integer) to argument(s) of type(s) Variable(function)

the real issue --kratt6, Tue, 13 Jan 2009 05:08:55 -0800 reply
axiom
first [1 for m in 1..4] - m
m is declared as being in PositiveInteger but has not been given a value.

possibly this is related to a problem in the source code of guessExpRat, see the comment there

better name... --kratt6, Tue, 13 Jan 2009 05:10:09 -0800 reply
Name: #439 defining a recurrence messes up type of argument => #439 iterator variable is not completely local




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