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I just learned that physicist Kurt Gottfried has died (on Aug 25).
Among many other things, he authored a classic quantum mechanics textbook.
https://physics.cornell.edu/news/em...co-founder-union-concerned-scientists-dies-93
He was nice enough to speak at a symposium I co-organized, back in the day.

https://physics.cornell.edu/news/em...co-founder-union-concerned-scientists-dies-93
He was nice enough to speak at a symposium I co-organized, back in the day.