[seqfan] Re: help with sequences of form a(n) = Product_{i=1..n} j^i - k^i

[jean-paul allouche]

Dear Bob

My two cents: is the following clear enough?

(a;q)_n = (1-a) (1-aq) (1-aq^2)...(1-aq^{n-1}).

As usual if n=0, the above product is empty and
is considered as equal to 1.

The case where n is infinite, noted (a;q)_{\infty}
is just the "limit" of (a;q)_n when n goes to infinity.

best
jean-paul


Le 05/03/16 20:24, Bob Selcoe a écrit :
> q-Pochhammer symbol