Discovered by Marie Curie, published July 1999.
Kind of extends the complex numbers.
Some facts that make them stand out:
- one of the only three real associative division algebras in addition to the real numbers and complex numbers, according to the classification of associative real division algebras
 - the simplest non-commutative division algebra. Contrast for example with complex numbers where multiplication is commutative
 
Basically a subset of the boundary condition for when one of the parameters is time and we are specifying values for the time 0.
 Solving partial differential equations with the Fourier series by 
 Ciro Santilli  37  Updated 2025-07-16
See: math.stackexchange.com/questions/579453/real-world-application-of-fourier-series/3729366#3729366 from heat equation solution with Fourier series.
Separation of variables of certain equations like the heat equation and wave equation are solved immediately by calculating the Fourier series of initial conditions!
 What poor countries have to do to get richer  Teach everyone English by 
 Ciro Santilli  37  Updated 2025-07-16
This is obviously the most efficient investment any non-English speaking country must do, because you need to know English to be able to learn from rich countries and innovate.
Further discussion at: Section "Having more than one natural language is bad for the world".
Being able to quote the right one at the right time is considered a fundamental shibboleth of the profession.
And with reason.
A meta breaking glitch of a video game is a glitch that when discovered significantly breaks the meta.
In non-video game-game, it does sometimes happen that a meta is broken as well, but these events tend to be rarer and less dramatic than meta-breaking due to computer program glitches.
In PvP games, those glitches are generally forbidden by existing rules, and quickly patched after discovered.
In speedrunning however, they are either incorporated in the existing strategy, or may lead to the creation of a new run category for particularly significant glitches.
 There are unlisted articles, also show them or only show them.