Multilinear form  Updated 2025-07-16
See form.
Analogous to a linear form, a multilinear form is a Multilinear map where the image is the underlying field of the vector space, e.g. .
 Raspberry Pi Foundation project  Updated 2025-07-16
 Change of basis between symmetric matrices  Updated 2025-07-16
When we have a symmetric matrix, a change of basis keeps symmetry iff it is done by an orthogonal matrix, in which case:
 Cirocoin  Updated 2025-07-16
Cirocoins can only be issued by Ciro Santilli.
Cirocoins are strictly nominal, and cannot be traded by recipients with anyone but Ciro, i.e. they are extremely illiquid.
Cirocoins can be removed from recipients at any point if they commit non-Cirist acts.
It is not possible to give a precise number to how many Cirocoins anyone owns. This is decided on a transaction by transaction basis. Ciro can therefore only inform you if your Cirocoin balance increased or decreased, but any attached number has no value, and thus are equivalent to expressions of type "you gained/lost a Cirocoin".
 Ladner's Theorem  Updated 2025-07-16
 Phasecraft  Updated 2025-07-16
 Transcendental number conjecture  Updated 2025-07-16
There's a billion simple looking expressions which are not known to be transcendental numbers or not. It's cute simple to state but hard to prove at its best.
Open as of 2020:
Bibliography:
- www.quantamagazine.org/recounting-the-history-of-maths-transcendental-numbers-20230627/ How Math Achieved Transcendence by David S. Richeson (2023).
 Ciro's 2D reinforcement learning games  Updated 2025-07-16
Prototype: github.com/cirosantilli/Urho3D-cheat
Top Down 2D Continuous Game with Urho3D C++ SDL and Box2D for Reinforcement learning by Ciro Santilli (2018)
 Source. Source code at: github.com/cirosantilli/Urho3D-cheat.Screenshot of the basketball stage of Ciro's 2D continuous game
. Source code at: github.com/cirosantilli/rl-game-2d-grid. Big kudos to game-icons.net for the sprites.Less good discrete prototype: github.com/cirosantilli/rl-game-2d-grid YouTube demo: Video 1. "Top Down 2D Continuous Game with Urho3D C++ SDL and Box2D for Reinforcement learning by Ciro Santilli (2018)".
Top Down 2D Discrete Tile Based Game with C++ SDL and Boost R-Tree for Reinforcement Learning by Ciro Santilli (2017)
 Source. The goal of this project is to reach artificial general intelligence.
A few initiatives have created reasonable sets of robotics-like games for the purposes of AI development, most notably: OpenAI and DeepMind.
However, all projects so far have only created sets of unrelated games, or worse: focused on closed games designed for humans!
What is really needed is to create a single cohesive game world, designed specifically for this purpose, and with a very large number of game mechanics.
Notably, by "game mechanic" is meant "a magic aspect of the game world, which cannot be explained by object's location and inertia alone" in order to test the the missing link between continuous and discrete AI.
The question then becomes: do we have enough computational power to simulation a game worlds that is analogous enough to the real world, so that our AI algorithms will also apply to the real world?
To reduce computation requirements, it is better to focus on a 2D world at first. Such world with the right mechanics can break any AI, while still being faster to simulate than a 3D world.
The initial prototype uses the Urho3D open source game engine, and that is a reasonable project, but a raw Simple DirectMedia Layer + Box2D + OpenGL solution from scratch would be faster to develop for this use case, since Urho3D has a lot of human-gaming features that are not needed, and because 2019 Urho3D lead developers disagree with the China censored keyword attack.
Simulations such as these can be viewed as a form of synthetic data generation procedure, where the goal is to use computer worlds to reduce the costs of experiments and to improve reproducibility.
Ciro has always had a feeling that AI research in the 2020's is too unambitious. How many teams are actually aiming for AGI? When he then read Superintelligence by Nick Bostrom (2014) it said the same. AGI research has become a taboo in the early 21st century.
Related projects:
- github.com/deepmind/lab2d: 2D gridworld games, C++ with Lua bindings
Related ideas:
- www.youtube.com/watch?v=MHFrhIAj0ME?t=4183 Can't get you out of my head by Adam Curtis (2021) Part 1: Bloodshed on Wolf Mountain :)
- www.youtube.com/watch?v=EUjc1WuyPT8 AI alignment: Why It's Hard, and Where to Start by Eliezer Yudkowsky (2016)
Bibliograpy:
- agents.inf.ed.ac.uk/blog/multiagent-learning-environments/ Multi-Agent Learning Environments (2021) by Lukas Schäfer from the Autonomous agents research group of the University of Edinburgh. One of their games actually uses apples as visual represntation of rewards, exactly like Ciro's game. So funny. They also have a 2d continuous game: agents.inf.ed.ac.uk/blog/multiagent-learning-environments/#mpe
- humanoid robot simulation
- Section "AI training game"
- Section "Software-based artificial life"
OpenAI Plays Hide and Seek... and Breaks The Game! by Two Minute Papers (2019)
 Source. Commentary of OpenAi's 2019 hide and seek paper. OpenAI does some similar simulations to what Ciro wants, but TODO do they publish source code for all of them? If not Ciro calls bullshit on non-reproducible research, and even worse due to the fake "Open" in the name. Does this repo contain everything?Much bigger simulation, AIs learn Phalanx by Pezzza's Work (2022)
 Source. 2d agents with vision. Simple prey/predator scenario. Josephson current  Updated 2025-07-16
Maximum current that can flow across a Josephson junction, as can be directly seen from the Josephson equations.
Is a fixed characteristic value of the physical construction of the junction.
 SQL TRIGGER in Sequelize  Updated 2025-07-16
Example: nodejs/sequelize/trigger_count.js
There is of course no built-in support for SQL TRIGGERs in Sequelize, but we can add our own: stackoverflow.com/questions/29716346/how-to-create-a-trigger-in-sequelize-nodejs/76215728#76215728
 Transcription (biology)  Updated 2025-07-16
 Transduction (genetics)  Updated 2025-07-16
 Ciro Santilli Big Five Personality traits  Updated 2025-07-16
This is how Ciro Santilli evaluates himself on the Big Five personality traits:
- Openness to experience; very high, see: Ciro Santilli's self perceived creative personality
- Conscientiousness: low, Ciro is driven very strongly by internal passion rather than external expectations
- Extraversion: high online, e.g. Ciro Santilli's campaign for freedom of speech in China, but much lower in the real world, no patience for something he's not Googled for in the last 5 seconds
- Agreeableness: high, see e.g. Ciro Santilli's self perceived compassionate personality. But Ciro has built some tolerance disagreement online for it online during Ciro Santilli's campaign for freedom of speech in China, you've got to fight for what is right.
- Neuroticism: medium high, Ciro does have some anxiety. It does help get things done sometimes, but it also sometimes gets in the way.
 Malus' Law  Updated 2025-07-16
Matches the quantum superposition probability proportional to the square law. Poor Étienne-Louis Malus, who died so much before this was found.
 Oxford Master Course in Mathematical and Theoretical Physics  Updated 2025-07-16
 Three polarizers 45 degrees apart  Updated 2025-07-16
 Kilogram  Updated 2025-07-16
Unit of mass.
Defined in the 2019 redefinition of the SI base units via the Planck constant. This was possible due to the development of the Kibble balance.
 NuNET  Updated 2025-07-16
 SQL 
COUNT function  Updated 2025-07-16Have a look at some interesting examples under nodejs/sequelize/raw/many_to_many.js.
 University of Cambridge student culture  Updated 2025-07-16
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