# Revision history [back]

sage: import sympy
sage: sympy.rsolve?


gives :

Signature:      sympy.rsolve(f, y, init=None)
Docstring:
Solve univariate recurrence with rational coefficients.

Given k-th order linear recurrence \operatorname{L} y = f, or
equivalently:

a_{k}(n) y(n+k) + a_{k-1}(n) y(n+k-1) + ... + a_{0}(n) y(n) =
f(n)

where a_{i}(n), for i=0, ..., k, are polynomials or rational
functions in n, and f is a hypergeometric function or a sum of a
fixed number of pairwise dissimilar hypergeometric terms in n,
finds all solutions or returns "None", if none were found.


[ Abbreviated... ]

HTH,

sage: import sympy
sage: sympy.rsolve?

sympy.rsolve?

gives :

Signature:      sympy.rsolve(f, y, init=None)
Docstring:
Solve univariate recurrence with rational coefficients.

Given k-th order linear recurrence \operatorname{L} y = f, or
equivalently:

a_{k}(n) y(n+k) + a_{k-1}(n) y(n+k-1) + ... + a_{0}(n) y(n) =
f(n)

where a_{i}(n), for i=0, ..., k, are polynomials or rational
functions in n, and f is a hypergeometric function or a sum of a
fixed number of pairwise dissimilar hypergeometric terms in n,
finds all solutions or returns "None", if none were found.


[ Abbreviated... ]