Ciro Santilli @cirosantilli 40

Centralized system that still attempts some level of privacy.

In it, a central bank issue tokens that are stored offline in your cell phone, a bit like cash bank notes.

When you take those tokens, a corresponding amount gets removed from your bank account, a bit like cash bank notes.

When a transaction is made, tokens are put into a spent token list via central API, and cannot be double spent thereafter. The corresponding ammount is then added to the bank account of the receiver. This also means that offline transactions are not possible.

When emitting, the bank signs the token with their private key. When spending, the bank checks that signature.

How do we prevent the bank from logging which token goes to which user besides trusting that they are running the software we whink they are running? Notably, couldn't timing be used to identify that?

This vocabulary likely entered Ciro Santilli's vernacular through playing Counter-Strike when he was a teenager.

Ermm, as of February 2021, I was able to update my 2FA app token with the password alone, it did not ask for the old 2FA.

So what's the fucking point of 2FA then? An attacker with my password would be able to login by doing that!

Is it that Google trusts that particular action because I used the same phone/known IP or something like that?

Their UI is horrendous as of 2020:

I need this for OurBigBook.com!! webmasters.stackexchange.com/questions/104241/can-google-analytics-track-url-fragment-in-url

They removed referrer path completely in GA4... OMG WTF are they doing!

Google has put considerable effort into custom hardware to greatly optimize its stack, in a way that is quite notable compared to other tech companies.

The "greatest common divisor" of two integers $x$ and $y$, denoted $\text{gdc}(x,y)$ is the largest natural number that divides both of the integers.

For example, $\text{gdc}(8,12)$ is 4, because:

Unfortunately, physicists and mathematicians keep using Greek letters in their formulas, so we just have to learn them.

A helpful way to remember is to learn a bit of their history/pronunciation: Section "Historical correspondence between Latin and Greek".

To learn the greek letters if you have a base latin alphabet, you must learn the sound of each letter, and which Latin letters they correspond to.

Symbols that look like Greek letters but are not Greek letters:

Is Ciro Santilli crazy (he is, but for this point specifically), or do many/most Greek letters represent the mouth position used in the pronunciation of the letter?

One reasonable and memorable approximation excluding any fine structure is:see for example example: hydrogen 1-2 spectral line.

The guitar is a highly imperfect instrument if compared to something like a piano, which is much more mathematically elegant.

However, Ciro Santilli just loves this imperfection for some reason, especially in the case of the electric guitar.

Bending, sliding and strumming just feel to good to not have.

And Ciro sucks are doing things in parallel, so the more single threaded approach of the guitar fits his brain/abilities better.

For those reasons, the electric guitar is Ciro's favorite musical instrument.

Analogous to what the Euler-Lagrange equation is to Lagrangian mechanics, Hamilton's equations give the equations of motion from a given input Hamiltonian:So once you have the Hamiltonian, you can write down this system of partial differential equations which can then be numerically solved.

The B Reactor of the facility produced the plutonium used for Trinity and Fat Man, and then for many more thousand bombs during the Cold War. More precisely, this was done at

Located in Washington, in a dry place the middle of the mountainous areas of the Western United States, where basically no one lives. The Columbia river is however nearby, that river is quite large, and provided the water needed by their activities, notably for cooling the nuclear reactors. It is worth it having look on Google Maps to get a feel for the region.

Unlike many other such laboratories, this one did not become a United States Department of Energy national laboratories. It was likely just too polluted.

Bibliography:

GitHub account: github.com/hplgit

It should be mentioned that when you start Googling for PDE stuff, you will reach Han's writings a lot under his GitHub Pages: hplgit.github.io/, and he is one of the main authors of the FEniCS Project.

Unfortunately he died of cancer in 2016, shame, he seemed like a good educator.

He also published to GitHub pages with his own crazy markdown-like multi-output markup language: github.com/hplgit/doconce.

Rest in peace, Hans.