- #1

Anixx

- 81

- 12

But I tried to verify the result by exponentiating it and failed.

Additionally, folks on Stackexchange pointed out that the limit (6) in the article is found incorrectly (it does not exist).

I asked this question on Mathoverflow, and received an answer, based on the paper, but other folks say the answer is incorrect (for instance, the integral in the second term has no principal value).

So, my question is, can we really find the logarithm of derivative? Another related question.