[sympy] request for help reviewing derivatives

Could someone please double check the results of U5 and U6 at this PR ? Thanks, /c -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this g

[sympy] C-finite, P-recursive, etc. sequence subclasses?

I have recently been working with linear recurrence relations with constant and / or polynomial coefficients w.r.t. the index. (These are called C-finite and P-recursive sequences, respectively.) These sequences have some nice properties, such as easy closed-form expressions in the C-finite cas