Ciro Santilli @cirosantilli 35

Ah, Ciro Santilli was not expecting this. What a unique mixture of humour, technology, politics and bravery. No wonder it was a box flop, there's something good about this film.

Feynman became a terrible womanizer after his first wife Arline Greenbaum died, involving himself with several married women, and leading to at least two abortions according to Genius: Richard Feynman and Modern Physics by James Gleick (1994).

Ciro Santilli likes to think that he is quite liberal and not a strict follower of Christian morals, but this one shocked him slightly even. Feynman could be a God, but he could also be a dick sometimes.

One particular case that stuck to Ciro Santilli's mind, partly because he is Brazilian, is when Feynman was in Brazil, he had a girlfriend called Clotilde that called him "Ricardinho", which means "Little Richard"; -inho is a diminutive suffix in Portuguese, and also indicates affection. At some point he even promised to take her back to the United States, but didn't in the end, and instead came back and married his second wife in marriage that soon failed.

Richard's third and final wife, Gweneth Howarth, seemed a good match for him though. When they started courting, she made it very clear that Feynman should decide if he wanted her or not soon, because she had other options available and being actively tested. Fight fire with fire.

Too many fun skit videos for Ciro Santilli's taste, but does have some serious derivations in quantum electrodynamics.

Publishes through the Fermilab YouTube channel under the playlist "Fermilab - Videos by Don Lincoln"

Some insights, but too much on the popular science side of things.

There is basically only one scalable business model in education as of the 2020's: helping teenagers pass university entry exams. And nothing else. Everything else is a "waste" of time.

Perhaps there is a little bit of publicity incentive to helping them win knowledge olympiads as well, but it is tiny in comparison, and almost certainly not a scalable investment. This may also depend on whether universities consider anything but exams, which varies by country.

That marked is completely saturated, and Ciro Santilli refuses to participate in it for moral reasons.

Beyond that, there is no scalable investment. Other non-scalable investments that could allow one to make a lifestyle business are:

Teenagers and young adults:

It is this perfect storm that places this specific section of education in such a bad shape that it is today.

This project is likely to fail. It could become the TempleOS of wikis. The project' autism score is quite high. It might be an impossible attempt at a lifestyle business. But Ciro is beyond caring now. It must be done. Other things that come to mind:

Dangerous combination:and for any crazy person who might wish to join: Men Wanted for Hazardous Journey.

If enough people use it, we could let people sell knowledge content through us.

Teachers have the incentive of making open source to get more students.

Students pay when they want help to learn something.

We take a cut of the transactions.

However this goes a bit against our "open content" ideal.

Forced sponsorware would be a possibility.

Would be a bit like Fiverr. Hmmm, maybe this is not a good thing ;-)

A list of reviews of such systems is maintained at:

This is the class of existing software the perhaps comes the closest to OurBigBook, in particular systems such as:

While we believe that OurBigBook can hold its own against most of them as a personal knowledge base, there is one feature which we believe truly distinguishes OurBigBook from all others in a big way: trustless mind meld with the OurBigBook topic feature, which no other system seems to have.

Many such systems are also no publishing focused enough, and are more focused only in maintaining people's private knowledge bases. Some of them don't even have publishing at all, or its complicated. While publishing is optional in OurBigBook, it is a crucial feature and extremely well supported.

Intuitive definition: real group of rotations + reflections.

Mathematical definition that most directly represents this: the orthogonal group is the group of all matrices that preserve the dot product.

Group of the unitary matrices.

Complex analogue of the orthogonal group.

One notable difference from the orthogonal group however is that the unitary group is connected "because" its determinant is not fixed to two disconnected values 1/-1, but rather goes around in a continuous unit circle. $U(1)$ is the unit circle.

The opposite of open source software.

Knock knock.