{c}

OK, so let's verify the main desired consequence of the <Lorentz transformation>: that everyone observes the same <speed of light>.

Observers will measure the speed of light by calculating how long it takes the light going towards $+x$ cross a rod of length $L = x_2 - x_1$ laid in the x axis at position $X1$.

TODO image.

Each observer will observe two events:
* $(t_1, x_1, y_1, z_1)$: the light touches the left side of the rod
* $(t_2, x_2, y_2, z_2)$: the light touches the right side of the rod

Supposing that the standing observer measures the speed of light as $c$ and that light hits the left side of the rod at time $T1$, then he observes the coordinates:
$$
\begin{aligned}
t_1 & = T1 \\
x_1 & = X1 \\
t_2 & = \frac{L}{c} \\
x_2 & = X1 + L \\
\end{aligned}
$$

Now, if we transform for the moving observer:
$$
\begin{aligned}
t_1' & = \gamma \left( t_1 - \frac{v x_1}{c^2} \right) \\
x_1' & = \gamma \left( x_1 - v t_1 \right) \\
t_2' & = \gamma \left( t_2 - \frac{v x_2}{c^2} \right) \\
x_2' & = \gamma \left( x_2 - v t_2 \right) \\
\end{aligned}
$$
and so the moving observer measures the speed of light as:
$$
\begin{aligned}
c' & = \frac{x_2' - x_1'}{t_2' - t_1'} \\
 & = \frac{(x_2 - v t_2) - (x_1 - v t_1)}{(t_2 - \frac{v x_2}{c^2}) - (t_1 - \frac{v x_1}{c^2})} \\
 & = \frac{(x_2 - x_1) - v (t_2 - t_1)}{(t_2 - t_1) - \frac{v}{c^2} (x_2 - x_1)} \\
 & = \frac{\frac{x_2 - x_1}{t_2 - t_1} - v}{1 - \frac{v}{c^2} \frac{x_2 -x_1}{t_2 - t_1}} \\
 & = \frac{c - v}{1 - \frac{v}{c^2} c} \\
 & = \frac{c - v}{\frac{c - v}{c}} \\
 & = c \\
\end{aligned}
$$

Lorentz transform consequence: everyone sees the same speed of light

{c}
{tag=Charitable organization}

<MacKenzie Bezos>'s charity instrument.

https://www.irishtimes.com/life-and-style/people/mackenzie-scott-how-the-former-mrs-bezos-became-a-philanthropist-like-no-other-1.4850049 MacKenzie Scott: How the former Mrs Bezos became a philanthropist like no other (2020) has some good mentions:
\Q[But as Scott's fame for giving away money has grown, so too has the deluge of appeals for gifts from strangers and old friends alike. That clamour may have driven Scott's already discreet operation further underground, with recent philanthropic announcements akin to sudden lightning bolts for unsuspecting recipients.]

The name of the organization is a reference to <the old man lost his horse>.

Lost Horse LLC

{c}
{title2=1861}
{wiki}

Unified all previous electro-magnetism theories into one equation.

Explains the propagation of light as a wave, and matches the previously known relationship between the <speed of light> and electromagnetic constants.

The equations are a limit case of the more complete <quantum electrodynamics>, and unlike that more general theory account for the quantization of <photon>.

The equations are a system of <partial differential equation>.

The system consists of 6 unknown functions that map 4 variables: time t and the x, y and z positions in space, to a real number:
* $E_x(t, x,y,z)$, $E_y(t, x,y,z)$, $E_z(t, x,y,z)$: directions of the electric field $\E : \R^4 \to \R^3$
* $B_x(t, x,y,z)$, $B_y(t, x,y,z)$, $B_z(t, x,y,z)$: directions of the magnetic field $\B : \R^4 \to \R^3$
and two known input functions:
* $\rho : \R^3\ to \R$: density of charges in space
* $\J : \R^3 \to \R^3$: current vector in space. This represents the strength of moving charges in space.

Due to the <conservation of charge> however, those input functions have the following restriction:
$$
\pdv{\rho}{t} + \div{\mathbf{\J}} = 0
$$
{title=Charge conservation}

Also consider the following cases:
* if a spherical charge is moving, then this of course means that $\rho$ is changing with time, and at the same time that a current exists
* in an <ideal> infinite cylindrical wire however, we can have constant $\rho$ in the wire, but there can still be a current because those charges are moving

 Such infinite cylindrical wire is of course an ideal case, but one which is a good approximation to the huge number of electrons that travel in a actual wire.

The goal of finding $\E$ and $\B$ is that those fields allow us to determine the force that gets applied to a charge via the <equation Lorentz force>, and then to find the force we just need to integrate over the entire body.

Finally, now that we have defined all terms involved in the Maxwell equations, let's see the equations:

$$
div{\E} = \frac{\rho}{\vacuumPermittivity}
$$
{title=Gauss' law}

$$
div{\B} = 0
$$
{title=Gauss's law for magnetism}

$$
\curl{\E} = -\pdv{\B}{t}
$$
{title=Faraday's law}

$$
\curl{\B} = \vacuumPermeability \left(\J + \vacuumPermittivity \pdv{E}{t} \right)
$$
{title=Ampere's circuital law}

You should also review the intuitive interpretation of <divergence> and <curl (mathematics)>.

Maxwell's equations

{c}
{tag=The most important physics experiments}
{title2=1987}
{wiki=Michelson–Morley_experiment}

Published as <On the Relative Motion of the Earth and the Luminiferous Ether>.

\Video[http://youtube.com/watch?v=lzBKlY4f1XA]
{title=Michelson <Interferometer> by Amrita Vlab (2013)}
{description=Shows the optical controls and alignment in more detail.}

\Video[http://youtube.com/watch?v=j-u3IEgcTiQ]
{title=Michelson <Interferometer> by TSG Physics (2012)}
{description=TSG PHysiQuantum electrodynamics bibliographycs is the channel from the MIT Department of Physics Technical Services Group. In the video they produce a very clear round interference pattern.}

Michelson-Morley experiment

{c}

* \a[microbit/micropython/uart.py]: the Micro BIt comes with a <UART> simulator via the USB connection, it is very convenient: https://support.microbit.org/support/solutions/articles/19000022103-outputing-serial-data-from-the-micro-bit-to-a-computer To output data to the computer simply use Python `print`. To receive you can e.g. use <GNU screen>:
 ``
 screen /dev/ttyACM0 115200
 ``
 It appears to be very unreliable however, some times it shows up, sometimes it doesn't.

Micro Bit example

{c}
{tag=Java program}
{tag=Open source video game}
{tag=Real-time strategy}
{wiki}

Conveyor belt 2D top down mining like <Factorio>, but with more emphasis on tower defense/<real-time strategy>, <PvP> looks a lot like <StarCraft> or <Age of Empires>.

As of pre alpha 135, the most annoying thing is that you can't easily start a campaign scenario from fresh, if you lose you have to start from wave 1 but with everything already half built as you left it. This gives you a huge advantage...

It is also annoying that you have to manually rebuild everything that was destroyed afer each attack, unless you have some unit that you can only unlock later on...

https://mindustry-unofficial.fandom.com/wiki/Future_Content\#New_Google_Play_Listing suggests <freemium> features being considered, but they are mostly minor or plaform specific. There seems to be no server list by default however, making the Steam multiplayer freemium valuable.

https://www.youtube.com/watch?v=o5ThSECaAwA suggests <code drop> is used.

It is a bit annoying that you have to unlock the tech tree little by little in campaign, but it does serve as a reasonable introduction to the general order of development. Games with progression state are boring, except when there is <permadeath>. But custom play scenarios have everything unlocked immediately, much better.

It is very cool that you can copy chunks of buildings as macros, and save them for later.

The game runs very well it feels like.

The logic blocks are particularly interesting, and allow you to program a block yourself.

Mindustry

{title2=PPA}

https://en.wikichip.org/wiki/power-performance-area

This is the mantra of the <semiconductor industry>:
* power and area are the main limiting factors of chips, i.e., your budget:
 * chip area is ultra expensive because there are sporadic errors in the fabrication process, and each error in any part of the chip can potentially break the entire chip. Although there are 

 The percentage of working chips is called the yield.

 In some cases however, e.g. if the error only affects single CPU of a multi-core CPU, then they actually deactivate the broken CPU after testing, and sell the worse CPU cheaper with a clear branding of that: this is called binning https://www.tomshardware.com/uk/reviews/glossary-binning-definition,5892.html
 * power is a major semiconductor limit as of 2010's and onwards. If everything turns on at once, the chip would burn. Designs have to account for that.
* performance is the goal.

 Conceptually, this is basically a set of algorithms that you want your hardware to solve, each one with a respective weight of importance.

 Serial performance is fundamentally limited by the <critical path>[longest path] that electrons have to travel in a given clock cycle.

 The way to work around it is to create pipelines, splitting up single operations into multiple smaller operations, and storing intermediate results in memories.

Power, performance and area

{c}
{tag=Double act}
{wiki}

They do have some really good ones.

It is interesting that in different episodes they often switch the dominant/passive roles, so it's not fixed as in <Laurel and Hardy>.

\Video[https://www.youtube.com/watch?v=hn1VxaMEjRU]
{title=Are we the Baddies? by <Mitchell and Webb>}
{description=See also: https://cirosantilli.com/china-dictatorship/nazi[].}

\Video[https://www.youtube.com/watch?v=dOBhf8f7cXM]
{title=Discoverer by <Mitchell and Webb>}
{description=Makes fun of the many terrible naming choices British navigators have made while discovering/rediscovering new lands.}

\Video[https://www.youtube.com/watch?v=HMGIbOGu8q0]
{title=Homeopathic A&E by <Mitchell and Webb>}

Mitchell and Webb

{c}
{title2=1998}
{wiki}

= MNIST
{c}
{synonym}

60,000 28x28 grayscale images of hand-written digits 0-9, i.e. 10 categories.

This is THE "<OG>" <computer vision dataset>.

Playing with it is the de-facto <computer vision> <hello world>.

But it is important to note that as of the 2010's, the benchmark had become too easy for many application.

The dataset can be downloaded from http://yann.lecun.com/exdb/mnist/[]:
``
wget \
 http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz \
 http://yann.lecun.com/exdb/mnist/train-labels-idx1-ubyte.gz \
 http://yann.lecun.com/exdb/mnist/t10k-images-idx3-ubyte.gz \
 http://yann.lecun.com/exdb/mnist/t10k-labels-idx1-ubyte.gz
``
but doing so is kind of pointless as both files use some crazy single-file custom binary format to store all images and labels. OMG!

OK-ish data explorer: https://knowyourdata-tfds.withgoogle.com/\#tab=STATS&dataset=mnist

\Image[http://web.archive.org/web/20230430064700im_/https://i.stack.imgur.com/7q9Zg.png]
{title=<MNIST> image 1 of a '0'}

\Image[http://web.archive.org/web/20230430064700im_/https://i.stack.imgur.com/RemMm.png]
{title=<MNIST> image 21 of a '0'}

\Image[http://web.archive.org/web/20230430064700im_/https://i.stack.imgur.com/qoTGE.png]
{title=<MNIST> image 3 of a '1'}

MNIST database

{tag=Tax}

https://politics.stackexchange.com/questions/73498/how-is-printing-money-different-from-taxing-people

To <Ciro Santilli>, a key observation is:
\Q[[The rich are more easily able to avoid the harm than poor and middle-class people [...] they are more likely to have large amounts of non-cash assets to shield themselves from inflation.]]
Clearly the rich will be much, much more shielded by keeping large parts of their wealth in shares... from this point of view, it is insane to print money!!! <Tax the rich> instead...

Mentions:
* <Erik Finman>: https://twitter.com/erikfinman/status/1446853065320112130

Money creation vs tax

Tested on <Ubuntu 23.10>;
``
git clone https://github.com/google-deepmind/mujoco
cd mujoco
git checkout 5d46c39529819d1b31249e249ca399f306a108ac
mkdir -p build
cd build
cmake ..
make -j
``

Now let's play. Minimal interactive <UI> simulation of a simple <MJCF> scene with one falling cube:
``
bin/basic ../doc/_static/hello.xml
``
Test soure code: https://github.com/google-deepmind/mujoco/blob/5d46c39529819d1b31249e249ca399f306a108ac/sample/basic.cc[]. The only thing you can do is <rotate> the scene with the <computer mouse> it seems. Mentioned at: https://mujoco.readthedocs.io/en/2.2.2/programming.html\#sabasic

Some more interesting models can be found under the `model/` directory: https://github.com/google-deepmind/mujoco/tree/5d46c39529819d1b31249e249ca399f306a108ac/model E.g. the imaginary humanoid robot <DeepMind> used in many demos can be seen with:
``
bin/basic ../model/humanoid/humanoid.xml
``

A more advanced <UI> with a few controls:
``
bin/simulate ../doc/_static/hello.xml
``
Test soure code: https://github.com/google-deepmind/mujoco/tree/5d46c39529819d1b31249e249ca399f306a108ac/simulate[]. Mentioned at: https://mujoco.readthedocs.io/en/2.2.2/programming.html\#sasimulate

A very cool thing about that UI is that you can manually control joints. There are no joints in the hello.xml, but e.g. with the humanoid model:
``
bin/simulate ../model/humanoid/humanoid.xml
``
under "Control" you move each joint of the robot separately which is quite cool.

\Video[https://www.youtube.com/watch?v=0ORsj_E17B0]
{title=Demo of MuJoCo's built-in `simulate` viewer by Yuval Tassa (2019)}

There's also a `bin/record` test executable that presumably renders the simulation directly to a file:
``
bin/record ../doc/_static/hello.xml 5 60 rgb.out
ffmpeg -f rawvideo -pixel_format rgb24 -video_size 800x800 -framerate 60 -i rgb.out -vf "vflip" video.mp4
``
Mentioned at: https://mujoco.readthedocs.io/en/2.2.2/programming.html\#sarecord but TODO that produced a broken video, related issues:
* https://github.com/google-deepmind/mujoco/issues/127
* https://github.com/google-deepmind/mujoco/issues/824

MuJoCo getting started

{c}
{wiki}

Once upon a time, this must have been a nice covered market.

But as of 2020, it is completely surrounded by extremely poor people, to the point that it makes you scared if you stand out in any way by showing any kind of middle/upper class wealth, or being a foreigner.

The market is basically a touristic spot that no person in Sao Paulo will ever go to (unless they are young, single, and can just walk in there by themselves) in the middle of this surreal environment.

In 2020 Ciro was there with <Ciro Santilli's wife>[his wife] on a touristic visit. Living in <Europe> at the time, he felt even more privileged. So they went to a fruit stand, and the man started giving his wife amazing free samples of very exotic fruit, some of which Ciro had never tasted himself, without saying the price. It did feel like he was giving out too much for free. Then Ciro decided of course to buy some more fruits to pay for the show, which was a nice show. Then while buying, it came out a bit more expensive than would have been reasonable, but Ciro was too dazzled by the speed and noises, and he paid for it. Later on, he told his wife about it, and how he felt that they had added some ultra-expensive bulk fruits that were of a clearly lower level than the gold nuggets of the free samples (especially for Brazil's cost standards). The presenter was an extremely crafty con artist, and Ciro felt like they had specifically preyed on <Ciro Santilli's self perceived compassionate personality>, because it was apparent that those men were underprivileged and fighting for their living day by day with those over-expensive fruits. This was an extremely valuable lesson, Ciro was glad that it was learnt at a relatively low cost on that occasion.

Municipal Market of São Paulo

{c}
{title2=Arran Fernandez' father}

Article likely written by him: https://www.theguardian.com/commentisfree/2010/feb/22/home-schooling-register-families

\Q[
“Especially my father. He was doing most of it and he is a savoury, strong character. He has strong beliefs about the world and in himself, and he was helping me a lot, even when I was at university as an undergraduate.”

An only child, Arran was born in 1995 in Glasgow, where his parents were studying at the time. His father has Spanish lineage, having a great grandfather who was a sailor who moved from Spain to St Vincent in the Carribean. A son later left the islands for the UK where he married an English woman. Arran’s mother is Norwegian.

“My father was writing and my mother is an economist. They both worked from home which also made things easier,” Arran says.
]
A bit like what <Ciro Santilli> feels about himself!

One of the articles says his father has a PhD. TODO where did he work? What's his PhD on? Photo: https://www.topfoto.co.uk/asset/1357880/

https://www.thetimes.co.uk/article/the-everyday-genius-pxsq5c50kt9[]:
\Q[Neil, a political economist, attended state and private schools in Hampshire but was also taught for a period at home by his mother.]
\Q[It’s strange because for most people maths is a real turn-off, yet maths is all about patterns and children of two or three love patterns. It just shows that schools are doing something seriously wrong.”]

Neil Fernandez

{c}

<NIST> database for <spectral line>: https://physics.nist.gov/PhysRefData/ASD/lines_form.html

Let's do a sanity check.

Searching for "H" for <hydrogen> leads to: https://physics.nist.gov/cgi-bin/ASD/lines1.pl?spectra=H&limits_type=0&low_w=&upp_w=&unit=1&submit=Retrieve+Data&de=0&format=0&line_out=0&en_unit=0&output=0&bibrefs=1&page_size=15&show_obs_wl=1&show_calc_wl=1&unc_out=1&order_out=0&max_low_enrg=&show_av=2&max_upp_enrg=&tsb_value=0&min_str=&A_out=0&intens_out=on&max_str=&allowed_out=1&forbid_out=1&min_accur=&min_intens=&conf_out=on&term_out=on&enrg_out=on&J_out=on

From there we can see for example the 1 to 2 lines:
* 1s to 2p: 121.5673644608 nm
* 1s to 2: 121.56701 nm TODO what does that $2$ mean?
* 1s to 2s: 121.5673123130200 TODO what does that mean?

We see that the table is sorted from lower from level first and then by upper level second.

So it is good to see that we are in the same 121nm ballpark as mentioned at <hydrogen spectral line>.

TODO why I can't see 2s to 2p transitions there to get the <fine structure>?

NIST Atomic Spectra Database

One major difference between the <elliptic curve over a finite field> or the <elliptic curve over the rational numbers> the <elliptic curve over the real numbers> is that not every possible $x$ generates a member of the curve.

This is because on the <equation Definition of the elliptic curves> we see that given an $x$, we calculate $x^3 + ax + b$, which always produces an element $y^2$.

But then we are not necessarily able to find an $y$ for the $y^2$, because not all <field (mathematics)>[fields] are not <quadratically closed fields>.

For example: with $a = 1$ and $b = 1$, taking $x = 1$ gives:
$$
y^2 = 1^3 + 1 \times 1 + 1 = 3
$$
and therefore there is no $y \in \Q$ that satisfies the equation. So $x = 1$ is not on the curve if we consider this <elliptic curve over the rational numbers>.

That $x$ would also not belong to <Elliptic curve over the finite field> $\F_4$, because doing everything $\mod 4$ we have:
$$
\begin{aligned}
0*0 &= 0 & &\mod 4 \\
1*1 &= 1 & &\mod 4 \\
2*2 &= 4 &= 0 &\mod 4 \\
3*3 &= 9 &= 1 &\mod 4 \\
\end{aligned}
$$
Therefore, there is no element $y \in \F_4$ such that $y \times y = 2$ or $y \times y = 3$, i.e. $2$ and $3$ don't have a <multiplicative inverse>.

For the <real numbers>, it would work however, because the <real numbers> are a <quadratically closed field>, and $\sqrt{3} \in \R$.

For this reason, it is not necessarily trivial to determine the <number of elements of an elliptic curve>.

Not every $x$ belongs to the elliptic curve over a non quadratically closed field

Not every x belongs to the elliptic curve over a non quadratically closed field

On <Urban Dictionary>: https://www.urbandictionary.com/define.php?term=no%20pun%20intended

No pun intended

{wiki}

= Nested set index
{synonym}
{title2}

How to implement <Nested set model> in <SQL>:
* https://stackoverflow.com/questions/192220/what-is-the-most-efficient-elegant-way-to-parse-a-flat-table-into-a-tree/42781302\#42781302 contains the correct left/size representation and update queries, which makes it much easier to maintain the tree without having to worry about the sizes of siblings which are constant
* https://stackoverflow.com/questions/192220/what-is-the-most-efficient-elegant-way-to-parse-a-flat-table-into-a-tree/194031\#194031 amazing ASCII art representations of the structure. Unfortunatly uses a wonky left/right representation, rather than the much more natural left/size representation from the other post

Nested set model in SQL

{wiki}

<Internet Relay Chat> vs <XMPP>: https://stackoverflow.com/questions/4149380/whats-the-best-open-protocol-for-chat-room-software

Open instant messaging protocols

{c}

https://github.com/jmorganca/ollama

Highly automated wrapper for various <open source> <LLMs>.

``
curl https://ollama.ai/install.sh | sh
ollama run llama2
``

And bang, a download later, you get a prompt. On <ciro santilli s hardware/P14s> it runs on <CPU> and generates a few tokens at a time, which is quite usable for a quick interactive play.

As mentioned at https://github.com/jmorganca/ollama/blob/0174665d0e7dcdd8c60390ab2dd07155ef84eb3f/docs/faq.md the downloads to under `/usr/share/ollama/.ollama/models/` and <ncdu> tells me:
``
--- /usr/share/ollama ----------------------------------
 3.6 GiB [###########################] /.ollama
 4.0 KiB [ ] .bashrc
 4.0 KiB [ ] .profile
 4.0 KiB [ ] .bash_logout
``

We can also do it non-interactively with:
``
/bin/time ollama run llama2 'What is quantum field theory?'
``
which gave me:
``
0.13user 0.17system 2:06.32elapsed 0%CPU (0avgtext+0avgdata 17280maxresident)k
0inputs+0outputs (0major+2203minor)pagefaults 0swaps
``
but note that there is a random seed that affects each run by default.

Some other quick benchmarks from <Amazon EC2 GPU>, on <Nvidia T4>:
``
0.07user 0.05system 0:16.91elapsed 0%CPU (0avgtext+0avgdata 16896maxresident)k
0inputs+0outputs (0major+1960minor)pagefaults 0swaps
``
On <Nvidia A10G>:
``

0.03user 0.05system 0:09.59elapsed 0%CPU (0avgtext+0avgdata 17312maxresident)k
8inputs+0outputs (1major+1934minor)pagefaults 0swaps
``

So it's not too bad, a small article in 10s.

It tends to babble quite a lot by default, but eventually decides to stop.

TODO is it possible to make it deterministic on the CLI? There is a "seed" parameter somewhere: https://github.com/jmorganca/ollama/blob/31f0551dab9a10412ec6af804445e02a70a25fc2/docs/modelfile.md\#parameter

Ollama

{c}
{wiki}

<Ciro Santilli> lived in Paris for a few years between 2013 and 2016, and he can confirm the uncontroversial fact that "Paris is Magic".

Not just one type of magic though. Every quarter in Paris has its own unique personality that sets it apart and gives it a different mood.

Ciro knows Paris not from its historical facts, but from the raw feeling of endless walks through its streets in different times of the year. Ciro is a walker.

Maybe one day Ciro will expand this section to try and convey into words his feelings of love for the city, but maybe the effort would be pointless. Maybe such feelings can only be felt by other free-roaming walker souls living in the city, and that is both beautiful and a shame.

See also the <Cirodance>[legendary Cirodance bowl of soup episode at Place de la République].

Ciro had written the following in the past before he lived in smaller cities, <Ciro Santilli's cycling>[started cycling] and joined the <Street reclamation> movement he thought:
\Q[Paris is a friendly city to walkers, as it is not too large, and does not have too many extremely busy roads, you can basically cross all of it on foot.]
Perhaps compared to <São Paulo City>, which is what he knew before that was true. But no, his standards have improved since. Paris has way too many cars. The noise of <internal combustion engine> vehicles is extremely annoying. And because there are too many personal vehicles, cars have to horn a lot to fight for space. Fuck cars. Paris has been making a big cycling push in the early 2020's, and that is great. But it is still far, far from good.

Title	Created	Updated
Lorentz transform consequence: everyone sees the same speed of light	1970-01-01	1970-01-01
Lost Horse LLC	1970-01-01	1970-01-01
Maxwell's equations	1970-01-01	1970-01-01
Michelson-Morley experiment	1970-01-01	1970-01-01
Micro Bit example	1970-01-01	1970-01-01
Mindustry	1970-01-01	1970-01-01
Power, performance and area	1970-01-01	1970-01-01
Mitchell and Webb	1970-01-01	1970-01-01
MNIST database	1970-01-01	1970-01-01
Money creation vs tax	1970-01-01	1970-01-01
MuJoCo getting started	1970-01-01	1970-01-01
Municipal Market of São Paulo	1970-01-01	1970-01-01
Neil Fernandez	1970-01-01	1970-01-01
NIST Atomic Spectra Database	1970-01-01	1970-01-01
Not every $x$ belongs to the elliptic curve over a non quadratically closed field	1970-01-01	1970-01-01
No pun intended	1970-01-01	1970-01-01
Nested set model in SQL	1970-01-01	1970-01-01
Open instant messaging protocols	1970-01-01	1970-01-01
Ollama	1970-01-01	1970-01-01
Paris	1970-01-01	1970-01-01

Ciro Santilli (@cirosantilli, 32)