Inactive for a long time.

Male
Physics & Maths are cool.
QFT, EM, GR.

"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light"

Nothing
Elaborately plans things for a living

"who has not been amazed to learn that the function y = e^x, like a phoenix rising again from it's own ashes, is it's own derivative?"