2019年9月14日 · Thus "h-bar" is no different myth, no matter how reliable it sounds. A very valid question is who introduced the h-bar notation. Since h-bar is also called Dirac h, I checked his book, and indeed there it is on page 87, of his famous book " Principles of Quantum Mechanics "

2019年10月3日 · In another question, I was asking about the origin of the reduced Planck's constant, $\hbar \equiv \frac{h}{2 \pi} .$ Specifically, I wanted to know why the symbol $`` \hbar "$ was selected for the

2025年1月2日 · Friedman, H. (1973). ... Bar-Hillel and Levy give a bit more in their [1973, pp. 28, 871. They argue that ...

William Playfair was a Scottish engineer and economist, who invented the pie and bar charts as well as the line graph, which have all played an indubitably ubiquitous role in modern statistics. I hadn't actually come across Playfair, before I browsed Colin Stuart's Maths 100 Numbers book.

2025年1月22日 · Is bar notation more intuitive or universally understood in certain contexts? Does it have origins tied to specific mathematicians or periods in history? I understand that both notations can represent equivalence classes, but I'd like to know why bar notation became the standard for quotient rings in particular.

2022年9月12日 · How was the L, LT, ST coordinate system for Metals developed and adopted? I am talking with some colleagues about comparing metallic and non-metallic materials. Obviously, "apples-to-apples&qu...

2024年11月23日 · But in H. G. Wells' "The Time Machine", this theory is used to explain the working of the titular device. And the novel came out 10 years before Einstein published his Special Theory of Relativity. This means that this theory must be older than Einstein's works but I cannot seem to find out who was behind this theory?

2025年1月20日 · $\begingroup$ Could it be this? "Galois’s work (which was only understood little by little, and much later; there is no trace in Riemann that he had learned from it, although (this is most remarkable) Dedekind, Privatdozent in Göttingen and close friend of Riemann, had since 1855 or 6, when Riemann was at the height of his powers, given a course on abstract groups and Galois theory)."

2022年3月13日 · Origin of "foo", "bar", and "baz" Short story about a mind-reading boyfriend Vintage Component ...

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