Ciro Santilli @cirosantilli 37

This is hot shit, a possible worst case but sure to get there scenario to understand the brain!

It is quite mind blowing when you think about it, that the huge majority of your body's cells is essentially just there to support a tiny ammount of germline, which are the only cells that can actually pass on! It is fun to imagine the cell type tree for this, with a huge branching of somatic cells, and only a few germline going forward.

With major mathematicians holding ideas such as:it is not surprise that the state of STEM education is so shit as of 2020, especially at the the missing link between basic and advanced! This also implies that the number of people that can appreciate any advanced mathematics research is tiny, and consequently so is the funding.

Has the property of visiting all descendants before the parent.

This is the order in which you would want to transverse to read the chapters of a book.

Like breadth-first search, this also has the property of visiting parents before any children.

Let's show that this definition is equivalent to the orthogonal group is the group of all matrices that preserve the dot product.

Note that:and for that to be true for all possible $x$ and $y$ then we must have:i.e. the matrix inverse is equal to the transpose.

Conversely, if:is true, then

These matricese are called the orthogonal matrices.

TODO is there any more intuitive way to think about this?

Most important things to know:

Some good mentions at: Video "Where is Anatomy Encoded in Living Systems? by Michael Levin (2022)".

One of the most flashy chinese musical instrument!

It is very similar to the Indian shehnai.

PDF table of contents feature requests: twitter.com/cirosantilli/status/1459844683925008385

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