Mathematica Asked on July 7, 2021
It is true that the following product has a singularity for k = 1, but from k = 2 it is convergent.
We can be convinced of this by numerical calculation:
N[Product[1/(1 - 1/GoldenRatio^k*(1 + k/GoldenRatio)), {k, 2, 1000}], 60]
N[Product[1/(1 - 1/GoldenRatio^k*(1 + k/GoldenRatio)), {k, 2, 2000}], 60]
(* 167.566103786067378643031697535002496062682533360948646334201
167.566103786067378643031697535002496062682533360948646334201 *)
But I discovered a bug if the product starts from 2.
Product[1/(1 - 1/GoldenRatio^k*(1 + k/GoldenRatio)), {k, 2, Infinity}]
(* Power::infy: Infinite expression 1/0 encountered.
ComplexInfinity *)
Why is evaluated as ComplexInfinity ?
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