Pre-order depth-first search Updated 2025-07-16
Like breadth-first search, this also has the property of visiting parents before any children.
The orthogonal group is the group of all invertible matrices where the inverse is equal to the transpose Updated 2025-07-16
Let's show that this definition is equivalent to the orthogonal group is the group of all matrices that preserve the dot product.
Note that:and for that to be true for all possible and then we must have:i.e. the matrix inverse is equal to the transpose.
These matricese are called the orthogonal matrices.
TODO is there any more intuitive way to think about this?
A Mathematician's Apology Updated 2025-07-16
With major mathematicians holding ideas such as:it is not surprise that the state of STEM education is so shit as of 2020, especially at the the missing link between basic and advanced! This also implies that the number of people that can appreciate any advanced mathematics research is tiny, and consequently so is the funding.
Exposition, criticism, appreciation, is work for second-rate minds. [...] It is a melancholy experience for a professional mathematician to find himself writing about mathematics. The function of a mathematician is to do something, to prove new theorems, to add to mathematics, and not to talk about what he or other mathematicians have done.
Deep learning framework Updated 2025-07-16
Amazon anticompetitive acquisition Updated 2025-07-16
Amazon is apparently notorious for having bought off many competitors, many of them just to kill off the competition and clear the way, not to actually reuse them.
youtu.be/tfAhTtBlb2Q?t=849 from Video "Jeff Bezos Revealed by Bloomberg (2015)" clearly shows Tim O'Reilly saying that very clearly about Bezos.Perhaps O'Reilly who is the bookselling business is not the greatest fan of Jeff. But still. My God.
I do know of a number of cases in which he [Bezos] has acquired companies in order to take out competitors, potential future competitors. Rather than because he actually wants that business to continue.
www.yalelawjournal.org/pdf/e.710.Khan.805_zuvfyyeh.pdf Amazon's Antitrust Paradox by Lina M . Khan from The Yale Law Journal raises this incredible issue.
GNU Free Documentation License Updated 2025-07-16
GNU screen Updated 2025-07-16
Regeneration (biology) Updated 2025-07-16
Suona Updated 2025-07-16
One of the most flashy chinese musical instrument!
Wang Jin beats Gao Qiu theme music from The Water Margin
. Source. Superconducting material Updated 2025-07-16
Amazon EC2 hello world Updated 2025-07-16
As of December 2023 on a
t2.micro instance, the only one part of free tier at the time with advertised 1 vCPU, 1 GiB RAM, 8 GiB disk for the first 12 months, on Ubuntu 22.04:$ free -h
total used free shared buff/cache available
Mem: 949Mi 149Mi 210Mi 0.0Ki 590Mi 641Mi
Swap: 0B 0B 0B
$ nproc
1
$ df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/root 7.6G 1.8G 5.8G 24% /To install software:
sudo apt update
sudo apt install cowsay
cowsay asdf Amazon Kindle Updated 2025-07-16
PDF table of contents feature requests: twitter.com/cirosantilli/status/1459844683925008385
AMD Updated 2025-07-16
How AMD went from nearly Bankrupt to Booming by Brandon Yen (2021)
Source. - youtu.be/Rtb4mjIACTY?t=118 Buldozer series CPUs was a disaster
- youtu.be/Rtb4mjIACTY?t=324 got sued for marketing claims on number of cores vs number of hyperthreads
- youtu.be/Rtb4mjIACTY?t=556 Ryzen first gen was rushed and a bit buggy, but it had potential. Gen 2 fixed those.
- youtu.be/Rtb4mjIACTY?t=757 Ryzen Gen 3 surpased single thread performance of Intel. Previously Gen 2 had won multicore.
American Civil War Updated 2025-07-16
Asset Updated 2025-07-16
Bluefors Updated 2025-07-16
Commodity Updated 2025-07-16
Hewlett Packard Enterprise Updated 2025-07-16
Single-nucleotide polymorphism Updated 2025-07-16
Standard Generalized Markup Language Updated 2025-07-16
XML predecessor.
There are unlisted articles, also show them or only show them.