Ciro Santilli @cirosantilli 37

Since Ciro Santilli is Brazilian, this is understandably a common conversation opener.

And rightly so, since soccer in particular is truly ridiculously popular in Brazil, where "what is your local soccer team?" is just as valid a conversation starter as "Which city are you from?".

So here goes Ciro's 2020 cynic answer:

The ironic reason is simple: maybe is Brazil loses more on this useless art, then maybe people will get tired of it, and instead invest on more useful and beautiful arts.

Notably, what Ciro really wants people to root for are:

Don't get Ciro wrong.

Playing sports yourself is amazing.

Observing professionals who do it amazingly can be beautiful.

But why the F do you have to root for a team unless your wife or children are playing in it (and even then..., how will that help?)?

What will you get from that?

Even if it is your national team, why does it matter if they win or lose?

Hooliganism just takes that uselessness to a hole new level.

Now some confessions.

A five year old Ciro will never forget when the feeling of Brazil won the 1994 World Cup on the penalties and everyone went mad that evening.

A nine year old Ciro stopped watching the 1998 World Cup Final of Brazil vs France half way during the 3-0 massacre and went to his front garden to kick his soccer ball on the metallic fence gate which represented a goal.

After that, Ciro went through puberty he guesses, and noticed that the natural sciences are just cooler than this soccer watching bullshit.

As mentioned on the introduction, the main objective of the course is to try predict qualitative properties of materials, notably the existence of certain phase transitions, starting from first principle toy models.

Key phenomena covered include:

Everyone is beginner when the field is new, and there is value in tutorials written by beginners.

For example, Ciro Santilli felt it shocking how direct and satisfying Richard Feynman's scientific vulgarization of quantum electrodynamics were, e.g. at: Richard Feynman Quantum Electrodynamics Lecture at University of Auckland (1979), and that if he had just assumed minimal knowledge of mathematics, he was about to give a full satisfactory picture in just a few hours.

Other supporters of this:

It is said, that once upon a time, programmers used CSV and collaborated on SourceForge, and that everyone was happy.

These days, are however, long gone in the mists of time as of 2020, and beyond Ciro Santilli's programming birth.

Except for hardware developers of course. The are still happily using Perforce and Tcl, and shall never lose their innocence. Blessed be their souls. Amen.

The orthogonal group has 2 connected components:

It is instructive to visualize how the $\pm 1$ looks like in $SO(3)$:

As a result it is isomorphic to the direct product of the special orthogonal group by the cyclic group of order 2:

A low dimensional example:because you can only do two things: to flip or not to flip the line around zero.

Note that having the determinant plus or minus 1 is not a definition: there are non-orthogonal groups with determinant plus or minus 1. This is just a property. E.g.:has determinant 1, but:so $M$ is not orthogonal.

A function where the domain is the same as the codomain.

The best place to get answers to programming questions as of 2019. Google into Stack Overflow is always the best bet.

An overview of Ciro Santilli's Stack Overflow contribution can be found at: Ciro Santilli's Stack Overflow contributions.

Ciro Santilli approves of this one, related: Section "Free gifted education".

The downside of the Thiel Fellowship is that it is realistically impossible for its fellows to do anything in deep tech, only information science startups would be possible, as they would not have the labs, or lab skills required for any deep tech if they drop out before a PhD. Related: Section "The only reason for universities to exist should be the laboratories".

The only solution is the harder process of actually remodelling our very broken educational system.

Ahh, this dude is just like Ciro Santilli, trying to create the ultimate natural sciences encyclopedia!

Lowercase looks like a lowercase letter N for some reason.

TODO is there any good intuitive argument or proof of conservation of energy, momentum, angular momentum?

Ciro Santilli is very happy to meet people with related interests, he really loves his like-minded online friends. Even if you don't have something a specific goal in mind for the contact, please just say hi.

To contact Ciro publicly about any general subject that is not covered in a more specific GitHub repository, including saying hi or suggestions about his website either:

For comments about China, first read:and then create a GitHub issue at: github.com/cirosantilli/china-dictatorship/issues/new

Publicly viewable contact is preferred if possible to more effectively share Ciro's wisdom with the world.

But if you feel more comfortable with private contact, no problem, either:

For other less good methods that will also likely work, use direct messages of the following profiles from under Section "Accounts controlled by Ciro Santilli":Ciro's Twitter DMs are also open, but note that Ciro receives endless Chinese language SPAM there which Twitter is doing nothing to combat, so it's not as reliable.

If you are a privacy freak or are going to tell Ciro state secrets Ciro has this GNU Privacy Guard public key: pubkey.gpg, but it's not something that he has ever really used.

Disqus comments were removed from his website in 2019-05-04, a manual dump is available here, removal rationale at: why Ciro Santilli removed Disqus comments from his website in 2019-05-04.