Professor Richard K. Guy, the great number theorist had passed away long before in March. Since there were no posts to commemorate him on this site (as far as I saw), I decided to post this question here. It would be great if some colleagues post their experiences here as regards his mathematical and other achievements. I was actually inspired by his book, *Unsolved Problems in Number theory*.

Thanks beforehand.

Crux Mathematicorumannounced a special issue dedicated to the memory of the professor. See page 97 of Crux Mathematicorum Vol. 46, No. 3 (March, 2020) from the corresponding web page of the journal. $\endgroup$ – user142929 Aug 4 at 18:57