Rho Updated 2025-07-16
This one is a little confusing: the upper case looks exactly like a letter P, but as the name suggests, it actually corresponds to the letter R. The letter P corresponds to pi instead.
General linear group Updated 2025-07-16
Invertible matrices. Or if you think a bit more generally, an invertible linear map.
When the field is not given, it defaults to the real numbers.
Non-invertible are excluded "because" otherwise it would not form a group (every element must have an inverse). This is therefore the largest possible group under matrix multiplication, other matrix multiplication groups being subgroups of it.
Group extension problem Updated 2025-07-16
Besides the understandable Wikipedia definition, Video "Simple Groups - Abstract Algebra by Socratica (2018)" gives an understandable one:
Given a finite group and a simple group , find all groups such that is a normal subgroup of and .
In particular, this is hard because you can't just take the direct product of groups to retrieve the original group: Section "Relationship between the quotient group and direct products".
Grinding for software interviews Updated 2025-07-16
If your kids are about to starve, fine, do it.
But otherwise, Ciro Santilli will not, ever, spend his time drilling programmer competition problems to join a company, life is too short for that.
Life is too short for that. Companies must either notice that you can make amazing open source software projects or contributions, and hire you for that, or they must fuck off.
Companies must either notice that you can make amazing projects or contributions, and hire you for that, or they must fuck off.
Punycode inscription Updated 2025-07-16
Namecoin examples are catalogued at: punycodes.xyz. The are small Unicode art or emoji code.
There seems to be nothing of particular artistic value as far as we've seen so far, the only interest in such tokens seems to be that:
RimWorld Updated 2025-07-16
Sexual arousal Updated 2025-07-16
Analects translation by Robert Eno (2015) 16.7:
The Junzi has three cautions.
When he is young and his blood and energy are not yet settled, he is cautious about sex.
When he is in his prime and his blood and energy have newly achieved strength, he is cautious about combativeness.
When he is old and his blood and energy are declining, he is cautious about acquisitiveness.
Dwarf Fortress Updated 2025-07-16
Made by a single dude. As SsethTzeentach puts it, this is the greatest autism project ever made.
Limited series Updated 2025-07-16
If you are going to make a television series, do make it a limited one. Plan one story, and execute it amazingly. Don't let things drag on and on.

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