Issue 2943:  rsolve: wrong result  
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Not necessarily wrong, but trivial. sympy: In [16]: rsolve(a*f(n+1)b**2*f(n)f(n+2), f(n), {2:a**2b**2, 3:a**32*a*b**2}) Out[16]: 0 or the same system written differently In [18]: rsolve(a*f(n1)b**2*f(n2)f(n), f(n), {2:a**2b**2, 1:a}) Out[18]: 0 mathematica: http://www.wolframalpha.com/input/?i=RSolve[{d[n]+%3D%3D+a+d[n++1]++b^2+d[n2]%2C+d[1]+%3D%3D+a%2C+d[2]+%3D%3D+a^2++b^2}%2C+d[n]%2C+n]
Mar 20, 2012
Project Member
#1
asmeurer@gmail.com
Status:
Valid
Oct 29, 2012
Also >>> x = Function('x') >>> a, k = symbols("a k") >>> rsolve(Eq(x(k + 1), a*x(k)), x(k)) 0
Feb 8, 2013
https://github.com/sympy/sympy/pull/1764
Feb 8, 2013
That was merged.
Status:
Fixed
Mar 5, 2014
We have moved issues to GitHub https://github.com/sympy/sympy/issues.
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Apr 6, 2014
Migrated to http://github.com/sympy/sympy/issues/6042 

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