The concept of an **energy functional** arises in various fields, particularly in physics, mathematics, and calculus of variations. An energy functional is generally a mathematical expression that associates a scalar value (energy) with a set of functions or configurations, often representing physical states or solutions to a problem.
The Kantor double, more formally known as the Kantor double construction or Kantor double group, refers to a specific method in the context of group theory, particularly in the study of semigroups and their representations. It involves constructing a group from a given semigroup or a set of elements, often used in algebraic structures related to geometry or combinatorics.
In the context of Wikipedia, a "stub" refers to an article that is considered to be incomplete or lacking in detail. The term "Materials Science stubs" would specifically refer to short or underdeveloped Wikipedia entries related to materials science. These stubs typically provide only basic information on a topic but can be expanded with more content, references, and details by contributors.
"Mathematics by country" can refer to various aspects related to the field of mathematics in different countries, including: 1. **Educational Systems**: The way mathematics is taught and structured in schools and universities varies by country. For example, countries like Finland are known for their strong emphasis on education, including mathematics, while countries like the United States have a more decentralized and varied approach. 2. **Research and Contributions**: Different countries have made significant contributions to mathematics throughout history.
Nemeth Braille is a braille code specifically designed for representing mathematical and scientific notation. Created by Dr. Abraham Nemeth in the 1960s, this system allows individuals who are visually impaired or blind to read and write mathematical symbols, equations, and scientific expressions in a tactile format using braille. Nemeth Braille includes unique braille symbols and rules to effectively convey a wide range of mathematical concepts such as numbers, arithmetic operations, algebra, geometry, calculus, and more.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
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. 
- Infinitely deep tables of contents:
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