This section is about functions that operate on numbers such as the integers or real numbers.
Let's see how long they last:
- Julian Schwinger: en.wikipedia.org/w/index.php?title=Julian_Schwinger&oldid=1039812272 greatly expanded the Early life and career with information from the book QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994)
Biography of Enrico Fermi by fellow physicist, free rent on the on the Internet Archive: archive.org/details/enricofermiphysi0000segr
This is generally good, especially compared to how crappy Evince, the default Ubuntu one, has been around 2014-2020.
Distance of stars nearest to the Sun as function of time
. Source. 
Some notable ones:
- Proxima Centauri, the nearest one, at 4 ly. It is part of the Alpha Centauri star system, which contains two other stars at very similar distances as well, and their relative distances to earth will change positions in a few tens of thousands of years.
- Sirius, the brightest star in the sky at 9 ly
quoteinvestigator.com/2017/09/25/progress/ on Quote Investigator says it appeared in 1948. Can't easily check, but will believe it for now.
Space-Time Approach to Quantum Electrodynamic by Richard Feynman (1949) Updated 2025-04-05 +Created 1970-01-01
The first key paper to his approach to quantum electrodynamics apparently.
Published on Physical Review 76.769.
Quantum Mechanical View of Reality by Richard Feynman (1983) Updated 2025-04-05 +Created 1970-01-01
Sample playlist: www.youtube.com/playlist?list=PLW_HsOU6YZRkdhFFznHNEfua9NK3deBQy
Basically the same content as: Richard Feynman Quantum Electrodynamics Lecture at University of Auckland (1979), but maybe there is some merit to this talk, as it is a bit more direct in some points. This is consistent with what is mentioned at www.feynman.com/science/qed-lectures-in-new-zealand/ that the Auckland lecture was the first attempt.
Some more information at: iucat.iu.edu/iub/5327621
By Mill Valley, CA based producer "Sound Photosynthesis", some info on their website: sound.photosynthesis.com/Richard_Feynman.html
They are mostly a New Age production company it seems, which highlights Feynman's absolute cult status. E.g. on the last video, he's not wearing shoes, like a proper guru.
Feynman liked to meet all kinds of weird people, and at some point he got interested in the New Age Esalen Institute. Surely You're Joking, Mr. Feynman this kind of experience a bit, there was nude bathing on a pool that oversaw the sea, and a guy offered to give a massage to the he nude girl and the accepted.
youtu.be/rZvgGekvHest=5105 actually talks about spin, notably that the endpoint events also have a spin, and that the transition rules take spin into account by rotating thing, and that the transition rules take spin into account by rotating things.
Represents image pixel by pixel, rather than by mathematical primitives such as done in vector graphics:
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