Haskell. Nothing beats joy of programming with pure maths. Maybe I didn't use it enough to lose this joy.

Talking about something I use, Rust.

I didn't see this image in the original paper, neither did I see anything about the "shape of photon". I might be mistaken, but this looks like a misinterpretation.

Q: in what sense exactly does this image represent "shape of photon"? What is on this surface, what's below it, what's outside of it?