Reproductive cue Updated +Created
A signal that indicates that an animal is ready for mating.
Amazon product Updated +Created
Gwern Branwen Updated +Created
Ciro Santilli envies this guy a bit. He dumps his brain more or less full time on his highly customized static website partly due to early Bitcoin investments gwern.net/me says:
I am a freelance American writer & researcher. (To make ends meet, I have a Patreon, benefit from Bitcoin appreciation thanks to some old coins, and live frugally.)
Also unsurprisingly he likes Haskell:
I mostly contribute to projects in Haskell, my favorite language
Ciro Santilli considers Gwern Ciro Santilli's e-soulmates due to his interest in "dark web things" like Bitcoin and Silk Road, his immense writing output in encyclopedic book-sized articles on a static website, and his desire to live frugally and just research and write all day. Ah, if only Ciro had some old coins!!!
This is likely a pseudonym, his real name not being publicly unknown, e.g. at news.ycombinator.com/item?id=5659278:
Why do you choose relative anonymity?
For the reasons I've said in the past. To which I can add personal safety: my Silk Road page is a bit questionable legally, and we all know that there are ways to exploit knowledge of one's True Name and address (even if, as far as I know, I have no enemies willing to resort to, say, 'swatting' me) - one group of stalkers called up a college they thought I worked at to see if they could get me fired or otherwise ruin my day.
Hamiltonian mechanics Updated +Created
Equivalent to Lagrangian mechanics but formulated in a different way.
TODO understand original historical motivation, www.youtube.com/watch?v=SZXHoWwBcDc says it is from optics.
Intuitively, the Hamiltonian is the total energy of the system in terms of arbitrary parameters, a bit like Lagrangian mechanics.
"Hello, World!" program Updated +Created
The most important program ever written!!!
Other programs that can be considered "hello worlds" in different contexts:
Positive definite symmetric bilinear form Updated +Created
Sine Updated +Created
Sulfur hydrade Updated +Created
Video 1.
Danger by Bayway Refinery
. Source. TODO year.
Sycee Updated +Created
TODO freely licensed image of sycees presented on a plate. This is how gifts/prizes would be formally handed in ancient China, possibly wrapped in silk to make it more discrete.
Water Margin scene Updated +Created
Fizeau experiment Updated +Created
Hafele-Keating experiment Updated +Created
Nabla symbol Updated +Created
Nabla is one of those: it was completely made up in modern times, and just happens to look like an inverted upper case delta to make things even more confusing!
Nabla means "harp" in Greek, which looks like the symbol.
Ciro's Edict #8 / OurBigBook.com Updated +Created
American learned society Updated +Created
American Physical Society Updated +Created
Complex coordinate space of dimension 2 Updated +Created
Journey to the West adaptation Updated +Created
Software development principle Updated +Created
Analog electronics Updated +Created

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