Classification of finite rings Updated 2025-07-16
accounts for them all, which we know how to do due to the classification of finite fields.
So we see that the classification is quite simple, much like the classification of finite fields, and in strict opposition to the classification of finite simple groups (not to mention the 2023 lack of classification for non simple finite groups!)
Finite ring Updated 2025-07-16
Bookdown Updated 2025-07-16
Written in R, but also relies on pandoc, so quite bad dependency wise.
Cross files references to IDs: yes. But no check by default for duplicates when doing automatic ID from title. Just automatically disambiguates with -1, -2 suffixes, and links take the last one available.
Source page splitting: splits at h2 by default. If configurable, likely always af fixed level?
Has some nice image generation from inline code from standard R plotting functions.
Hello world on Ubuntu 23.04 after installing R:
sudo R -e 'install.packages("bookdown")'
git clone https://github.com/rstudio/bookdown-demo
cd bookdown-demo
Rscript -e 'bookdown::render_book("index.Rmd")'
xdg-open _book/index.html
The build CLI comes from: stackoverflow.com/questions/50888871/how-to-use-rscript-command-line-tool-to-build-a-book-in-bookdown
The installatoin Rscript -e 'bookdown::render_book("index.Rmd")' takes several minutes, it compiles a bunch of stuff from source apparently. but it did work.
Teaching statement Updated 2025-07-16
Part of the motivation letter required by some American universities explaining how amazing of a teacher you are, e.g.: wstein.org/job/Teaching/index.html
Denominator Updated 2025-07-16
Numerator Updated 2025-07-16
Capoeira music Updated 2025-07-16
Capoeira music is amazing. And some Brazilian pop adaptations of it have also been awesome.
Video 2.
Triste Bahia by Caetano Veloso
. Source.
Video 3.
Na Roda de Capoeira by Nara Leão
. Source. From the 1964 album "Opinião De Nara"
Title track Updated 2025-07-16
Boston Updated 2025-07-16
Implosion-type fission weapon Updated 2025-07-16
Implosion-type fission weapons are more complicated than gun-type fission weapon because you have to precisely coordinate the detonation of a bunch of explosives.

There are unlisted articles, also show them or only show them.