Ciro Santilli @cirosantilli 37

Predicted by the Dirac equation.

We've likely known since forever that photons are created: just turn on a light and see gazillion of them come out!

Photon creation is easy because photons are massless, so there is not minimum energy to create them.

The creation of other particles is much rarer however, and took longer to be discovered, one notable milestone being the discovery of the positron.

In the case of the electron, we need to start with at least enough energy for the mass of the electron positron pair. This requires a photon with wavelength in the picometer range, which is not common in the thermal radiation of daily life.

Related: Dirac equation vs quantum electrodynamics.

This is the order in which a binary search tree should be traversed for ordered output, i.e.:

This ordering makes sense for binary trees and not k-ary trees in general because if there are more than two nodes it is not clear what the top node should go in the middle of.

This is unlike pre-order depth-first search and post-order depth-first search which generalize obviously to general trees.

The Taylor series expansion is the most direct definition of the expontial as it obviously satisfies the exponential function differential equation:

Using de novo DNA synthesis to synthesize a genes to later insert somewhere.

Note that this is a specific application of de novo DNA synthesis, e.g. polymerase chain reaction primers is another major application that does not imply creating genes.

www.youtube.com/watch?v=zvuYJTL90J8&t=166s The Coronavirus Replication Cycle by Kevin Tokoph (2020)

Their system is quite good actually. Not as good as a GitHub repo with all the tests made explicit. But still pretty good.

Highly managed, you don't even see the Docker images, only some higher level JSON configuration file.

These setups are really convenient and cheap, and form a decent way to try out a new website with simple requirements.

Basically the same as classical limit, but more for quantum mechanics.

Sometimes you are really certain that something is a required substep for another thing that is coming right afterwards.

When things are this concrete, fine, just do the substep.

But you have to always beware of cases where "I'm sure this will be needed at some unspecified point in the future", because such points tends to never happen.

YAGNI is so fundamental, there are several closely related concepts to it:

Once upon a time, when Ciro Santilli had a job, he had a programming problem.

A senior developer came over, and rather than trying to run and modify the code like an idiot, which is what Ciro Santilli usually does (see also experimentalism remarks at Section "Ciro Santilli's bad old event memory"), he just stared at the code for about 10 minutes.

We knew that the problem was likely in a particular function, but it was really hard to see why things were going wrong.

After the 10 minutes of examining every line in minute detail, he said:and truly, that was the cause.

And so, Ciro was enlightened.

Basically a synonym for central processing unit nowadays: electronics.stackexchange.com/questions/44740/whats-the-difference-between-a-microprocessor-and-a-cpu