Can't help, have to ask this question:

how would an algorithm that would deal with this problem for infinite (huge...) lists look like...?

Update: And, given a finite part of each serie, a₁, ..., a_N, b₁, ..., b_M, how many - which - terms of the result could be trustfully computed (knowing that there are other terms to follow) ?

And how far could we advance with the 'arrival' of a_N+1 and/or b_M+1...?

hmmmm... Is someone aware of some good readings in order to get the answers ?

Thanks,

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