Wealth distribution in the United States Updated +Created
Grew tremendously since the 1990's, likely linked to the Internet.
TODO why is it so hard to find a proper cumulative distribution function-like curve? OMG. This appears to be also called a Lorenz curve.
Video 1.
Wealth Inequality in America by politizane
. Source.
Diacritic Updated +Created
Diagonal matrix Updated +Created
Digital electronic computer Updated +Created
Unsurprisingly the term "computer" became a synonym for this from the 1960s onwards!
National Security Agency employee Updated +Created
Dirac-von Neumann axioms Updated +Created
This is basically what became the dominant formulation as of 2020 (and much earlier), and so we just call it the "mathematical formulation of quantum mechanics".
Discogs Updated +Created
The IMDb of music! They actually have a reputation system apparently. And sneaked in a vinyl marketplace as well.
The website name sounds like play on words: disc + hog, with hog in the sense "memory-hog", i.e. something that consumes all your computer's memory.
Video 1.
Everything you need to know about discogs.com by Vinyl for Miles (2019)
Source. Gives a good overview of the website.
Video 2.
AnalogPlanet Interviews Discogs Founder Kevin Lewandowski (2019)
Source.
Immigration Updated +Created
C. elegans nervous system Updated +Created
Video 1.
Interview with John White by MRC Laboratory of Molecular Biology (2023)
Source.
Symplectic group Updated +Created
Intuition, please? Example? mathoverflow.net/questions/278641/intuition-for-symplectic-groups The key motivation seems to be related to Hamiltonian mechanics. The two arguments of the bilinear form correspond to each set of variables in Hamiltonian mechanics: the generalized positions and generalized momentums, which appear in the same number each.
Seems to be set of matrices that preserve a skew-symmetric bilinear form, which is comparable to the orthogonal group, which preserves a symmetric bilinear form. More precisely, the orthogonal group has:
and its generalization the indefinite orthogonal group has:
where S is symmetric. So for the symplectic group we have matrices Y such as:
where A is antisymmetric. This is explained at: www.ucl.ac.uk/~ucahad0/7302_handout_13.pdf They also explain there that unlike as in the analogous orthogonal group, that definition ends up excluding determinant -1 automatically.
Therefore, just like the special orthogonal group, the symplectic group is also a subgroup of the special linear group.
The best films of all time Updated +Created
There is only a very fine difference between a very good film, and the best films of all time. Perhaps it is something to do on how epic the subject matter is? It is often very hard to tell, and switches between the categories are also possible.
Discrete logarithm Updated +Created
Super Mario 64 Updated +Created
And as a result, adult Ciro really enjoys tool-assisted speedruns of the game.
Super Mario Bros. Updated +Created
The Man From Earth (2007) Updated +Created
Good theory of Jesus.
List of similar feeling films: www.youtube.com/watch?v=zwYwFoanrNg 11 Underrated Hard Sci-fi Movies by Marvelous Videos (2021)
TwinsUK Updated +Created
jq Updated +Created
Yet another awk-like domain-specific language to do things from the CLI in a ridiculously short humber of character? Oh yes.
Los Alamos National Laboratory Updated +Created
Video 1.
Historic Manhattan Project Sites at Los Alamos by Los Alamos National Lab
. Source.
Historian Alan B. Carr:

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