This mini-project walks the category hierarchy Wikipedia dumps and dumps them in various simple formats, HTML being the most interesting!
Some of the contributions are subjectively self evaluated based on:
Ciro Santilli's open source contributions Bug reports and feature requests by 
Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli 40 Updated 2025-07-16This shall not list bugs solved by my accepted pull requests.
A proof in some system for the formalization of mathematics.
Off-the-shelf techniques to become a teaching superhero.
Customized website idea at: OurBigBook.com.
Once you have crated something awesome, you have to advertise it, otherwise no one will ever find it.
This means:
- Then ask them if they want to talk about anything.
- whenever someone asks as question on an online forum, answer it, and link to the section of your material that also answers that question.The material will answer many of their future questions.
Eventually, people will find you on the front page of Google searches, and then you will know that you've truly made something useful.
William Austin Starmer, commonly known as Keir Starmer, is a British politician and lawyer who has been the leader of the Labour Party and the Member of Parliament (MP) for Holborn and St Pancras since 2015. Before entering politics, he had a distinguished career in law, serving as the Director of Public Prosecutions and leading the Crown Prosecution Service in England and Wales.
The De Rham-Weil theorem is a result in the field of algebraic geometry and homological algebra, primarily concerning the relationships between algebraic varieties and their cohomology.
"Topos" can refer to several things depending on the context: 1. **Mathematics (Category Theory)**: In mathematics, particularly in category theory, a topos (plural: topoi or toposes) is a category that behaves like the category of sets and has certain additional properties. Topoi provide a framework for doing geometry and topology in a categorical way, and they can be used to study logical systems.
Cherry Lane Music is a music publishing company that has played a significant role in the music industry by acquiring, managing, and licensing a diverse catalog of songs across various genres. Founded in 1960, the company is known for representing a wide array of songwriters and composers, particularly in the fields of popular and contemporary music. Cherry Lane also provides services related to music licensing, sheet music publishing, and other rights management functions.
Adolf Martin Schlesinger (born on December 3, 1883, and died on December 16, 1960) was a German-born American composer and conductor known for his contributions to music in the early to mid-20th century. His work spanned various musical forms and genres, although he is less widely recognized than some of his contemporaries.
A hail cannon is a device that is claimed to prevent or reduce hail damage to crops by creating shock waves that disrupt the formation of hailstones in the atmosphere. The theory behind the hail cannon is that by generating loud sounds or explosive shock waves, the device can interfere with the conditions necessary for hail formation. Hail cannons typically consist of a large metal tube that is fired using an explosive charge or similar mechanism to create a loud noise.
Alfred Kalmus is a notable figure in the field of music, particularly associated with music publishing and performance. He was a British conductor, composer, and music educator. He is recognized for his contributions to music during the 20th century, and he may be noted for activities related to the promotion of new music and the performance of contemporary works.
Benjamin Carr (circa 1775–1831) was an American composer, conductor, and music educator. He is best known for his contributions to American music in the early 19th century, particularly in the context of choral and vocal music. Carr was also involved in music publishing and worked to promote music education in the United States.
E. T. Paull refers to Edward Thomas Paull, an American composer and music publisher active in the late 19th and early 20th centuries. He is known for his contributions to popular music and for publishing a wide range of compositions, particularly piano music and arrangements of popular songs. Some of his works gained popularity during his time, and he played a significant role in the music publishing industry, helping to promote many composers and their music.
John Stillwell Stark (1885-1970) was an American chemist known for his contributions to the field of chemistry, particularly in the area of chemical education and research. He had a significant impact on the development of chemical literature and was involved in various professional organizations.
Robert Lienau is known for his contributions to the publishing field, particularly in the context of music. He was involved in music publishing and may be recognized for his work related to composers and their scores.
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