The paper aims to present, in a systematic way, an elegant proof of Deepti's inequality. Both the inequality and various ideas concerning the issue were discussed on the Mathoverflow website by a number of users, but none have appeared in the literature thus far. In this work, suggestions pertaining to users 'Deepti' and 'fedja' are traced, whence the title. The results or the paper are new, and the proof is divided into a series of statements, many of which are of interest in themselves.
OSTROVSKA, SOFIYA and TURAN, MEHMET
"Fedja's proof of Deepti's inequality,"
Turkish Journal of Mathematics: Vol. 42:
3, Article 28.
Available at: https://journals.tubitak.gov.tr/math/vol42/iss3/28