Quote by Bill Gates

Capital flight

The general and ideal user acquisition is of course organic Googling:
* user does not understand his teacher's explanation of a subject
* user <Googles> into rare specific subject
* looks around, then login/create account with <OAuth> to leaves a comment or upvote
* notice that you can fork anything
* <mind blown>[mind = KABOOM]

However, before that point, it is very likely that Ciro will have to physically do some very hard and specific user acquisition work at some University. Maybe there is a more virtual way of achieving this.

This work will involve going through some open set of <university lecture notes>, and creating a superior version of them on OurBigBook.com, and somehow getting students to notice it and use it as a superior alternative to their crappy lecture notes.

Another very promising route is publishing the answers to old examination questions on the website. It is likely that we will be able to overcome any copyright issues by uploading only the answers to numbered questions. There is a minor risk that these would be considered <derivative works> of the copyrighted questions. But universities would have to be very anal to enforce a DMCA for that!!!
* https://www.reddit.com/r/learnmath/comments/lj12pg/problem_sets_and_solutions_equivalent_to/

Getting in contact with students is an epic challenge, as an incredibly deep chasm separates us:
* it is basically impossible to try and approach teachers: <how to convince teachers to use CC BY-SA>
* and on the other hand, how will you get university students to trust you are not a pedophile and that you actually want to help them?

  The missing aspect is how to join their main "class communication group", e.g. a <WhatsApp> or <Discord> chat they have. That would be the perfect entry point to communicate with the end users. But that entry point is also generally closed exclusively for students, and sometimes lecturers, and will not accept anyone external.

  Perhaps Ciro would be able to do something with one of the two Universities he attended in the past: <École Polytechnique> or <University of São Paulo>. But there was no clear channel in those institutions for that. There is either an "infinitely noisy Facebook with everyone that bothered" or silence, deathly silence and isolation of no contact. The key hard part is getting a per-course granularity chat. <Discord> Student Hubs are a fantastic initiative in that area. Shame that Discord is an unusable mess with zero ways to select which notifications you care about: <Discord email notifications>{full}!

  One approach method that shows some promise is to follow the <Student societies>, which often host open events of interest outside of work hours.

Walking with advertisement t-shirts mentioning specific course names in some university location is something Ciro seriously considers, that's how desperate things are. Watch out: https://docs.ourbigbook.com/\#public-relations for T-shirt news!


User acquisition

{disambiguate=unit}
{wiki}

= Mole
{synonym}


Mole

{c}
{title2=2023}
{wiki}

https://wormwideweb.org/
\Q[Browse freely moving whole-brain calcium imaging datasets]


WormWideWeb

Selenium

Chinese policy

{title2=2007}
{wiki}

Used e.g. in the <Sycamore processor>.

The most basic type of transmon is in <Ciro's ASCII art circuit diagram notation>, an <LC circuit> e.g. as mentioned at https://youtu.be/cb_f9KpYipk?t=180[] from <video The transmon qubit by Leo Di Carlo (2018)>:
``
+----------+
| Island 1 |
+----------+
   |   |
   X   C
   |   |
+----------+
| Island 2 |
+----------+
``

https://youtu.be/eZJjQGu85Ps?t=2443 from <video Superconducting Qubits I Part 1 by Zlatko Minev (2020)> describes a (possibly simplified) physical model of it, as two superconducting metal islands linked up by a <Josephson junction> marked as `X` in the diagram as per-<Ciro's ASCII art circuit diagram notation>:
``
+-------+       +-------+
|       |       |       |
| Q_1() |---X---| Q_2() |
|       |       |       |
+-------+       +-------+
``
The circuit is then analogous to a <LC circuit>, with the islands being the <capacitor>. The <Josephson junction> functions as a non-linear <inductor>.

Others define it with a <SQUID device> instead: https://youtu.be/cb_f9KpYipk?t=328 from <video The transmon qubit by Leo Di Carlo (2018)>. He mentions that this allows tuning the inductive element without creating a new device.

\Video[https://www.youtube.com/watch?v=dKTNBN99xLw]
{title=The superconducting <transmon> qubit as a microwave resonator by <Daniel Sank> (2021)}

\Video[https://www.youtube.com/watch?v=5ggYJJjlw8o]
{title=Calibration of Transmon Superconducting Qubits by Stefan Titus (2021)}
{description=Possibly this <Keysight> which would make sense.}


Transmon

The <Busy beaver scale> allows us to gauge the difficulty of proving certain (yet unproven!) mathematical <conjectures>!

To to this, people have reduced certain mathematical problems to deciding the <halting problem> of a specific <Turing machine>.

A good example is perhaps the <Goldbach's conjecture>. We just make a <Turing machine> that successively checks for each even number of it is a sum of two primes by naively looping down and trying every possible pair. Let the machine halt if the check fails. So this machine halts <iff> the <Goldbach's conjecture> is false! See also <Conjecture reduction to a halting problem>.

Therefore, if we were able to compute $BB(n)$, we would be able to prove those conjectures automatically, by letting the machine run up to $BB(n)$, and if it hadn't halted by then, we would know that it would never halt.

Of course, in practice, $BB$ is generally <uncomputable>, so we will never know it. And furthermore, even if it were computable, it would take a lot longer than the age of the universe to compute any of it, so it would be useless.

However, philosophically speaking at least, the number of states of the equivalent <Turing machine> gives us a philosophical idea of the complexity of the problem.

The <busy beaver scale> is likely mostly useless, since we are able to prove that many non-trivial <Turing machines> do halt, often by reducing problems to simpler known cases. But still, it is cute.

But maybe, just maybe, reduction to Turing machine form could be useful. E.g. <The Busy Beaver Challenge> and other attempts to solve <BB(5)> have come up with large number of automated (usually parametrized up to a certain threshold) <Turing machine decider> programs that automatically determine if certain (often large numbers of) Turing machines run forever.

So it it not impossible that after some reduction to a standard <Turing machine> form, some conjecture just gets automatically brute-forced by one of the deciders, this is a path to


Busy beaver scale

Hebrew Bible

Subtitle editor

Decay chain

Double quotes

Semisynthesis

Hemoglobin

Genetics company

Virgo cluster

{c}

For every <continuous symmetry> in the system (<Lie group>), there is a corresponding conservation law.

Furthermore, given the symmetry, we can calculate the derived conservation law, and vice versa.

As mentioned at http://buzzard.ups.edu/courses/2017spring/projects/schumann-lie-group-ups-434-2017.pdf[], what the symmetry (<Lie group>) acts on (obviously?!) are the <Lagrangian> <generalized coordinates>. And from that, we immediately guess that manifolds are going to be important, because the generalized variables of the Lagrangian can trivially be <Non-Euclidean geometry>, e.g. the <pendulum> lives on an infinite cylinder.

\Video[https://www.youtube.com/watch?v=CxlHLqJ9I0A]
{title=The most beautiful idea in physics - Noether's Theorem by <Looking Glass Universe> (2015)}
{description=One sentence stands out: the generated quantities are called the generators of the transforms.}

\Video[https://www.youtube.com/watch?v=AuqKsBQnE2A]
{title=The Biggest Ideas in the Universe | 15. Gauge Theory by <Sean Carroll> (2020)}
{description=This attempts a one hour hand wave explanation of it. It is a noble attempt and gives some key ideas, but it falls a bit short of Ciro's desires (as would anything that fit into one hour?)}

\Video[https://www.youtube.com/watch?v=hF_uHfSoOGA]
{title=The Symmetries of the universe by <ScienceClic> English (2021)}
{description=https://youtu.be/hF_uHfSoOGA?t=144 explains intuitively why symmetry implies consevation!}


Noether's theorem

{c}
{wiki}

Co-founder of <Apple>.

Is Jobs <evil>? Is he interesting? Undoubtedly.

https://www.folklore.org/ProjectView.py?project=Macintosh&characters=Steve%20Jobs[] has some good anecdotes about him.

<Ciro Santilli> is especially fond of: <Jobs and Wozniak's blue box>.

Good quotes:
* "Try to have a nice family life, have fun, save a little money." quote at: <don't be a pussy>{full} and the related <Jobs and Wozniak's blue box> attitude
* "Steve Jobs Insult Response" on <backward design>
* Steve Jobs Pixar office design philosophy: great ideas happen from chance meetings on corridors, not in board rooms: https://officesnapshots.com/2012/07/16/pixar-headquarters-and-the-legacy-of-steve-jobs/
* <Steve Jobs' 2005 Stanford Commencement Address>
* <Here's to the crazy ones>: Ciro would like to believe that this is mostly written by Jobs, but apparently it was just written by an advertisement agency. Good job though. 

You must watch this: <video Bill Gates vs Steve Jobs by Epic Rap Battles of History (2012)>.

Evil deeds:
* not recognizing own daughter for many years??? https://en.wikipedia.org/wiki/Lisa_Brennan-Jobs
* lying to <Steve Wozniak> about the 5000 dollar Atari bonus: https://web.archive.org/web/20110612071502/http://www.woz.org/letters/general/91.html
* not giving stock to early garage employees: https://www.businessinsider.com/steve-wozniak-gave-early-apple-employees-10-million-in-stock-2014-9 OK, not a <legal> obligation. But... love?


Title	Author	Created	Updated
Quote by Bill Gates	Ciro Santilli 32	1970-01-01	1970-01-01
Capital flight	Ciro Santilli 32	1970-01-01	1970-01-01
User acquisition	Ciro Santilli 32	1970-01-01	1970-01-01
Mole	Ciro Santilli 32	1970-01-01	1970-01-01
WormWideWeb	Ciro Santilli 32	1970-01-01	1970-01-01
Selenium	Ciro Santilli 32	1970-01-01	1970-01-01
Chinese policy	Ciro Santilli 32	1970-01-01	1970-01-01
Transmon	Ciro Santilli 32	1970-01-01	1970-01-01
Busy beaver scale	Ciro Santilli 32	1970-01-01	1970-01-01
Hebrew Bible	Ciro Santilli 32	1970-01-01	1970-01-01
Subtitle editor	Ciro Santilli 32	1970-01-01	1970-01-01
Decay chain	Ciro Santilli 32	1970-01-01	1970-01-01
Double quotes	Ciro Santilli 32	1970-01-01	1970-01-01
Semisynthesis	Ciro Santilli 32	1970-01-01	1970-01-01
Hemoglobin	Ciro Santilli 32	1970-01-01	1970-01-01
Genetics company	Ciro Santilli 32	1970-01-01	1970-01-01
Virgo cluster	Ciro Santilli 32	1970-01-01	1970-01-01
Noether's theorem	Ciro Santilli 32	1970-01-01	1970-01-01
Steve Jobs	Ciro Santilli 32	1970-01-01	1970-01-01
Rectangular wave	Ciro Santilli 32	1970-01-01	1970-01-01

Ciro Santilli (@cirosantilli, 32)