Ciro Santilli @cirosantilli 35

In the Galilean transformation, there are two separate invariants that two inertial frame of reference always agree on between two separate events:

However, in special relativity, neither of those are invariant separately, since space and time are mixed up together.

Instead, there is a new unified invariant: the spacetime-interval, given by:

Note that this distance can be zero for two events separated.

When non-specialists say "Ethernet cable", they usually mean twisted pair for Ethernet over twisted pair.

But of course, this term is much more generic to a more specialized person, since notably fiber optics are also extensively used in Ethernet over fiber.

Reference strain: E. Coli K-12 MG1655.

The leading open source cross architecture and KVM emulator of the 2010's.

Great way to understand how operating systems work, which Ciro Santilli used extensively in his Linux Kernel Module Cheat.

Ciro Santilli has some good related articles listed under: the best articles by Ciro Santillis.

Remarkable 2 is really, really good. Relatively fast refresh + touchscreen is amazing.

No official public feedback forum unfortunately:

PDF table of contents could be better: twitter.com/cirosantilli/status/1459844683925008385

They put a lot of emphasis into base calling. E.g.:

There are 3: real numbers, complex numbers and quaternions.

Notably, the octonions are not associative.

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

Oh yeah, that felt good. A few months before he died.