The history of artificial intelligence (AI) is a rich and evolving narrative that spans several decades, marked by both astonishing advancements and notable setbacks. Here's a brief overview of key milestones in AI history: ### 1. **Foundations (1940s - 1950s)** - **Theoretical Foundations**: The groundwork for AI was laid in the 1940s and 1950s with the development of theories in mathematics, logic, and computer science.
Sydney Chapman (1888–1970) was a notable British mathematician and geophysicist, renowned for his work in the fields of mathematics, astrophysics, and atmospheric science. He made significant contributions to the understanding of atmospheric physics, especially in areas related to the Earth's ionosphere, gas dynamics, and the behavior of gases in the atmosphere.
A cashless society is an economic environment in which financial transactions are conducted through digital means rather than with physical cash. This can include methods such as credit and debit cards, mobile payment apps, digital wallets, and online banking. In a cashless society, the use of cash is minimal or non-existent, and transactions are primarily facilitated by electronic systems. **Key Features of a Cashless Society:** 1.
The Lander, Parkin, and Selfridge conjecture is a statement in number theory that pertains to the existence of certain types of prime numbers. Specifically, it deals with prime numbers that can be represented in a specific way using two distinct primes.
Abugida by Ciro Santilli 40 Updated 2025-07-16
Somewhat midway between a syllabary and an alphabet: you write out consonants, and vowels are "punctuation-like-modifiers".
E.g.: the main Hindi script (devanagari) and most other Indian languages.
A Markov number is a specific type of positive integer that is associated with a particular solution to Markov's equation, which is given by: \[ x^2 + y^2 + z^2 = 3xyz \] where \( x \), \( y \), and \( z \) are positive integers. A set of numbers \( (x, y, z) \) that satisfies this equation is called a Markov triple.
Pell's equation is a specific type of Diophantine equation, which is an equation that seeks integer solutions. It is typically expressed in the form: \[ x^2 - Dy^2 = 1 \] Here, \( x \) and \( y \) are integers, and \( D \) is a positive integer that is not a perfect square. The main objective is to find integer pairs \((x, y)\) that satisfy this equation.
The Sum of Four Cubes Problem refers to the mathematical question of whether every integer can be expressed as the sum of four integer cubes.
The Museum of the Gorge is a local museum located in Ironbridge, Shropshire, England. It is part of the Ironbridge Gorge World Heritage Site, which is known for its historical significance in the development of the iron and coal industries during the Industrial Revolution. The museum is dedicated to showcasing the history and heritage of the Ironbridge Gorge area, particularly its industrial past.
The "Nutshell Studies of Unexplained Death" is a collection of dioramas created by Frances Glessner Lee in the 1940s. Glessner Lee was a pioneer in forensic science who aimed to improve the training of homicide investigators. The dioramas are incredibly detailed miniature scenes that depict various murder mysteries and unexplained deaths. Each diorama is designed to present a different set of circumstances surrounding a fictional death, complete with realistic props and meticulous attention to detail.
Centroidal Voronoi Tessellation (CVT) is a specific type of Voronoi tessellation where the sites of the Voronoi cells are chosen to be the centroids (centers of mass) of their respective cells. This idea combines the concepts of Voronoi diagrams and centroid calculations to optimize the placement of points in a given space, often leading to more evenly distributed and spatially balanced cell shapes.
In set theory and mathematics, an "opaque set" is not a standard or commonly used term. However, the concept of an opaque set might be used informally in certain contexts to refer to a set whose elements or the properties of which are not fully transparent or visible, or whose characteristics cannot be easily discerned. If you're encountering the term "opaque set" in a specific mathematical context, programming language, or another field, it may have a specialized meaning.
"Fantastic Four: Rise of the Silver Surfer" is a superhero film released in 2007, directed by Tim Story. It is a sequel to the 2005 film "Fantastic Four" and is based on the Marvel Comics superhero team of the same name. The film features the main characters: Mr. Fantastic (Reed Richards), the Invisible Woman (Sue Storm), Human Torch (Johnny Storm), and The Thing (Ben Grimm), who are a team of superheroes with unique powers.
T'Channa appears to be a misspelling or alternate spelling related to the character T'Challa from Marvel Comics, who is the Black Panther, the superhero and king of the fictional African nation of Wakanda. T'Challa has become a prominent character in both comic books and the Marvel Cinematic Universe, particularly through films such as "Black Panther" (2018).
Fact-checking is the process of verifying the accuracy and truthfulness of information, claims, statements, or assertions made by individuals, organizations, and media. It involves researching and cross-referencing facts against reliable sources to determine whether the information presented is correct, misleading, or false. Fact-checking can be applied in various contexts, including journalism, politics, social media, and academic work, to help reduce the spread of misinformation and disinformation.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact