ImageMagick HOWTO Updated 2025-07-16
Rank of an elliptic curve over the rational numbers Updated 2025-07-16
Mordell's theorem guarantees that the rank (number of elements in the generating set of the group) is always well defined for an elliptic curve over the rational numbers. But as of 2023 there is no known algorithm which calculates the rank of any curve!
It is not even known if there are elliptic curves of every rank or not: Largest known ranks of an elliptic curve over the rational numbers, and it has proven extremely hard to find new ones over time.
TODO list of known values and algorithms? The Birch and Swinnerton-Dyer conjecture would immediately provide a stupid algorithm for it.
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They've been trying to get it to work forever, and it's beeen buggy forever:
Became the default on Ubuntu 21.04: www.omgubuntu.co.uk/2021/01/ubuntu-21-04-will-use-wayland-by-default
YouTube channels that just go over Stack Exchange questions Updated 2025-07-16
Some people have been creating YouTube channels that just post and go over a large number of Stack Exchange questions, some of them with a quick random intro video. Perfectly legal due to CC BY-SA but really weird stuff!
- Roel Van de Paar www.youtube.com/@RoelVandePaar. This one seems to be the OG. As of June 2024 it had 2M videos (!), 161K subscribers and only 47M views. youtube.fandom.com/wiki/Roel_Van_de_Paar mentions "he has the highest number of uploads of any YouTube channel". Interestingly at www.linkedin.com/in/roelvandepaar/?originalSubdomain=au he says he is a test engineer at MariaDB.
- Peter Schneider www.youtube.com/@peterschneiderQandA e.g. www.youtube.com/watch?v=GBQhrKRpUdI "How to put a newline special character into a file using the echo command and redirection operator?" from unix.stackexchange.com/questions/191694/how-to-put-a-newline-special-character-into-a-file-using-the-echo-command-and-re)Stackexchange
- Sophia Wagner www.youtube.com/@SophiaWagnerQandA. As of June 2024 it had 14k videos and only 88k views, so she made 88 bucks on it.
- E.g. www.youtube.com/watch?v=elIlkJneVBI "Vertically stack multiple images using ImageMagick" goes over superuser.com/questions/290656/vertically-stack-multiple-images-using-imagemagick
- www.youtube.com/@LukeChaffeyTechInfo Luke Chaffey, an Indian-American dude, e.g. www.youtube.com/watch?v=wmx6mN_G83s "Do Boost Geometry nearest queries always sort results ordered by smallest distance first?"
- www.youtube.com/@pythonoracle The Python Oracle. Speech synthesis, with different accents. Cute!
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