Ciro Santilli @cirosantilli 35

Creator of QEMU and FFmpeg, both of which Ciro Santilli deeply respects. And a bunch other random stuff.

What is shocking about Fabrice this is that both are insanely important software that Ciro Santilli really likes, and both seem to be completely unrelated subjects!

Google made billions on top of this dude:

At last but not least, Fabrice also studied in the same school that Ciro Santilli studied in France, École Polytechnique.

It is a shame that he keeps such a low profile, there are no videos of him on the web, and he declines interviews.

Another surprising fact is that Fabrice has not worked for the "Big Tech Companies" as far as can be publicly seen, but rather mostly on smaller companies that he co-founded: www.quora.com/Computer-Programmers/Computer-Programmers-Where-is-Fabrice-Bellard-employed

And he's also into some completely random projcts unsurprisingly:

Bibliography:

LLVM front-end for C and related language like C++ etc.

Basically a synonym of Lorentz covariance?

Alternative to the Lorentz gauge, but less used in general as it is not as nice for relativity invariance.

Physics from Symmetry by Jakob Schwichtenberg (2015) page 66 shows one in terms of 4x4 complex matrices.

More importantly though, are the representations of the Lie algebra of the Lorentz group, which are generally also just also called "Representation of the Lorentz group" since you can reach the representation from the algebra via the exponential map.

Bibliography:

Two observers travel at fixed speed relative to each other. They synchronize origins at x=0 and t=0, and their spacial axes are perfectly aligned. This is a subset of the Lorentz group. TODO confirm it does not form a subgroup however.

Very hot stuff! It's like ISA-portable assembly, but with types! In particular it also it deals with calling conventions for us (since it is ISA-portable). TODO: isn't that exactly what C does? :-) LLVM IR vs C

Documentation: llvm.org/docs/LangRef.html

The inverse of the magnetic flux quantum.

Ciro Santilli hates it when an expert does this!!!

If you estimate that the audience won't know the name of the concept, that's fine, do explain it as well.

But you must also give the name!!!

This also manifests itself when news outlets omit foreign names from healines, notably Chinese, but likely happens to all non-european languages too.

The variables of the Lagrangian, e.g. the angles of a double pendulum. From that example it is clear that these variables don't need to be simple things like cartesian coordinates or polar coordinates (although these tend to be the overwhelming majority of simple case encountered): any way to describe the system is perfectly valid.

In quantum field theory, those variables are actually fields.

One strange quark bound with one up quark or a down quark. 6 combinations exist, 4 if we consider antiparticles the same as particles.

PCIe TLC OPAL2.

www.samsung.com/semiconductor/ssd/client-ssd/MZVLB512HAJQ/ (archive).

www.samsung.com/semiconductor/global.semi/file/resource/2018/05/PM981_M.2_SSD_Datasheet_v1.3_for_General.pdf | web.archive.org/web/20181224225410/https://www.samsung.com/semiconductor/global.semi/file/resource/2018/05/PM981_M.2_SSD_Datasheet_v1.3_for_General.pdf

sudo hdparm -Tt /dev/nvme0n1p5 on Ubuntu 20.04:

 Timing cached reads:   29812 MB in  1.99 seconds = 15007.00 MB/sec
 HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
 Timing buffered disk reads: 6328 MB in  3.00 seconds = 2109.00 MB/sec

Nominal maximum sequential read speed: 3,000 MB/s

With X-ray crystallography by David Chilton Phillips. The second protein to be resolved fter after myoglobin, and the first enzyme.

Published at: Structure of Hen Egg-White Lysozyme: A Three-dimensional Fourier Synthesis at 2 Å Resolution (1965). The work was done while at the Davy Faraday Research Laboratory of the Royal Institution.

Phillips also published a lower resolution (6angstrom) of the enzyme-inhibitor complexes at about the same time: Structure of Some Crystalline Lysozyme-Inhibitor Complexes Determined by X-Ray Analysis At 6 Å Resolution (1965). The point of doing this is that it points out the active site of the enzyme.