Ciro Santilli @cirosantilli 40

We define it as a linear map where the domain is the same as the image, i.e. an endofunction.

Examples:

Second quantization also appears to be useful not only for relativistic quantum mechanics, but also for condensed matter physics. The reason is that the basis idea is to use the number occupation basis. This basis is:

Bibliography:

Subtle is the Lord by Abraham Pais (1982) chapter 4 "Entropy and Probability" mentions well how Boltzmann first thought that the second law was an actual base physical law of the universe while he was calculating numerical stuff for it, including as late as 1872.

But then he saw an argument by Johann Joseph Loschmidt that given the time reversibility of classical mechanics, and because they were thinking of atoms as classical balls as in the kinetic theory of gases, then there always exist a valid physical state where entropy decreases, by just reversing the direction of time and all particle speeds.

So from this he understood that the second law can only be probabilistic, and not a fundamental law of physics, which he published clearly in 1877.

Agriculture is not the official definition of the age. But it is good enough. Likely related to the official end of glaciations thing.

Related:

The first time Ciro Santilli Googled this was when trying to repair his cell phone.

2019 cell phones are glued together with adhesive, which makes them impossible to repair them unless you have a heat gun, spend hours and hours learning and planning, and accept the risk of breaking the screen

Repairability scores: www.ifixit.com/smartphone-repairability

If you take a phone less than 300 dollars to a repair shop in the first world, they will say: I've never repaired this crap, and likely for the price of the repair you should just buy a new one, and so to the trash goes the old one, polluting the planet, and in comes a new one, enriching the manufacturer further.

European Union, I need you now.

Oh, there is some 2017 EU action actually: (archive) www.europarl.europa.eu/news/en/press-room/20170629IPR78633/making-consumer-products-more-durable-and-easier-to-repair

Good article: www.androidauthority.com/device-repairability-807585/ (archive).

TODO there was one which was relly good, can't find it anymore. One day.

This is true. The level of competition in university entry exams in Asia in insane in the early 21st century compared to the West.

This is actually both good and bad. Good because it selects some very good exam passers. And bad because it selects some very good exam passers.

The more of their syntax gets merged into mainline Cascading Style Sheets, the better the world will be.

Like Jimmy Wales, he used to work in finance and then quit. What is it with those successful e-learning people??

Microscope by Antonie van Leeuwenhoek used to first observe microorganisms.

"More complex and general" integral. Matches the Riemann integral for "simple functions", but also works for some "funkier" functions that Riemann does not work for.

Ciro Santilli sometimes wonders how much someone can gain from learning this besides the beauty of mathematics, since we can hand-wave a Lebesgue integral on almost anything that is of practical use. The beauty is good reason enough though.

Revolutionary for its time, and a big part of Ciro's Enlightenment.

But too insane, and did not keep up with internet age, and so Ciro wants to kill it now.

Bought: November 2023 during Black Friday sale for £1,323.00 to be Ciro Santilli's main personal laptop.

Six years after, and we are 2x on every key spec (except processor Hz ;-) at about 1/2 the price and 1/2 the weight (though smaller 14" screen for greater portability), so not bad! Customized to max out each hardware spec:

Specs:

Identifiers:

Upon arrival:

Buy research:

Log:

2024-01-17: firmware update:Actually fixed performance mode: askubuntu.com/questions/604720/setting-to-high-performance/1343879#1343879

This was THE craze thing in Brazil before Pokemon, it was shown from 1994 to 1997. In particular the collectible action figures! It was possibly more popular in Brazil than e.g. in the US: www.quora.com/Why-was-Saint-Seiya-so-popular-in-Brazil

The thing as quite violent, rated for 14-year olds, but no one gave a fuck, 7 yo Ciro was happily watching it. We protect children too much.

That series also had quite a religious feel to it (as obviously suggested by the series English name itself). It must also have been a great motivator to getting young kids into astronomy!

Ciro's favorite character was definitely Andromeda Shun. He was smart and thoughtful, and had the coolest most complex weapon: his chain whips. He's also a bit effeminate, with his pink clothing and a gentle way. Perhaps that is the reason for adult Ciro's mild fascination with the Andromeda Galaxy.

The English name is horrendous... the Portuguese/French name is so much better: Knights of the Zodiac! Saying this in English just reminded Ciro Santilli of the Zodiac Killer. But nevermind.

Size: 10 micrometers.

Genome:

Proteins per cell: 42m: www.cell.com/pb-assets/journals/research/cell-systems/cels_384.pdf

Division time: 100 minutes.

Minimization project: en.wikipedia.org/wiki/Saccharomyces_cerevisiae#Synthetic_yeast_genome_project | syntheticyeast.org/