The great scientist Freeman Dyson (Institute for Advanced Study, Princeton), passed away in 2020. Both my father and I have interacted with Dyson. For my recollections on Freeman Dyson, see my article “Dyson Remembrance“
Alladi’s Photos of Dyson
The August 2021 issue of the Notices of the American Mathematical Society contains a Memorial on Dyson with contributions from several eminent mathematicians and physicists. See PDF.
An abridged version of my Dyson Remembrance is included in the Memorial that appeared in the Notices of the AMS.