Ken Ono is a prominent Japanese-American mathematician known for his work in number theory, particularly in the areas concerning modular forms, partitions, and q-series. Born on April 17, 1961, he has made significant contributions to the understanding of various mathematical topics, including the theory of partitions and the study of the Ramanujan congruences.
Jim Geelen is a prominent Australian mathematician known for his contributions to graph theory and matroid theory. His work often involves the study of combinatorial structures and has implications in various areas of mathematics. Geelen has collaborated with other mathematicians and has published numerous papers in reputable journals.
Jiří Matoušek is a Czech mathematician known for his contributions to areas such as combinatorics, discrete geometry, and algorithmic geometry. He has worked on a variety of problems concerning geometric structures and their combinatorial properties. Matoušek has also authored influential texts and papers in these fields, helping to advance understanding and techniques related to geometric combinatorics.
Karim Adiprasito is a mathematician known for his contributions in the fields of combinatorics and discrete geometry. He has made significant advancements in various areas, particularly in the study of the geometric properties of objects and their implications in combinatorial settings. Adiprasito is also known for his work on the theory of matroids and other related mathematical structures. His research often involves applying techniques from algebraic topology and other branches of mathematics to solve problems in combinatorics.
Lu Jiaxi (also known as Lu Jiaxi, 1904–1991) was a prominent Chinese mathematician known for his contributions to various fields within mathematics, particularly in complex analysis and algebraic topology. He played a significant role in the development of mathematics in China during the 20th century and was instrumental in the education of many mathematicians. Lu held various academic positions and was involved in research as well as teaching for many years.
Pamela E. Harris is a prominent mathematician known for her contributions to algebraic combinatorics, especially in the areas of partition theory and symmetric functions. She is also recognized for her work in mathematical education and outreach, particularly in promoting diversity in STEM fields. Harris has been involved in various initiatives to encourage underrepresented groups to pursue careers in mathematics and science. Additionally, she has published numerous research papers and is an advocate for making mathematics more accessible and inclusive.
Stanisław Radziszowski is a Polish mathematician known for his contributions to various areas of mathematics, particularly in combinatorics and graph theory. He has worked on topics such as extremal graph theory, tournament theory, and combinatorial designs. His research has been influential in the development of mathematical concepts associated with these fields.
Stevo Todorčević is a prominent mathematician, known for his work in set theory and topology. He has made significant contributions to the field, including studies on real-valued functions, cardinal characteristics of the continuum, and the structure of the set of reals. His work often involves the intersection of various areas in mathematics, particularly in relation to large cardinals and forcing. Todorčević has published numerous papers and is recognized in the mathematical community for his research and influence.
A **Lyndon word** is a non-empty string that is strictly smaller than all of its nontrivial suffixes in the lexicographical order. More formally, a string \( w \) is called a Lyndon word if it cannot be written as a nontrivial concatenation of two smaller strings, i.e.
A semiperfect magic cube is a three-dimensional generalization of a magic square. Just like a magic square, a semiperfect magic cube is an arrangement of numbers in a cube where the sums of the numbers in each row, each column, and the two main diagonals are all equal.
A train track map, also known as a railway map, is a graphical representation of a railway network. It typically shows the layout of tracks, stations, and other key features of the railway system. These maps can vary in detail and scale, ranging from highly detailed local maps that highlight specific lines and stations to broader regional or national maps that provide an overview of the entire railway network.
An edge-matching puzzle is a type of spatial reasoning puzzle in which the goal is to assemble a set of pieces with edges that match according to specific criteria. Each piece typically has different colors, patterns, or symbols along its edges, and the player must arrange the pieces so that adjacent edges share matching features.
A ranked poset (partially ordered set) is a specific type of poset that has an additional structure related to its elements' ranks. In a ranked poset, each element can be assigned a rank, which is a non-negative integer that gives a measure of the "level" or "height" of that element within the poset.
The Steiner Traveling Salesman Problem (STSP) is a variant of the classic Traveling Salesman Problem (TSP), which is a well-known problem in combinatorial optimization. In the traditional TSP, the goal is to find the shortest possible route that visits a set of given cities and returns to the original city. The challenge is to minimize the total distance traveled. The Steiner Traveling Salesman Problem extends this concept by allowing the introduction of additional points, known as Steiner points, into the route.
The Bass–Quillen conjecture is a conjecture in the field of algebraic K-theory, specifically concerning finitely generated infinite projective modules over a commutative ring. It was formulated by mathematicians Hyman Bass and Daniel Quillen in the 1970s.
Primary decomposition is a concept in the field of algebra, particularly in commutative algebra and algebraic geometry, that deals with the structure of ideals in a ring, specifically Noetherian rings. The primary decomposition theorem provides a way to break down an ideal into a union of 'primary' ideals.
"Coimage" can refer to different concepts depending on the context in which it's used, particularly in mathematics or computer science. Here are a couple of interpretations: 1. **In Mathematics (Category Theory):** The term "coimage" is often used in the context of category theory and algebraic topology. In this setting, the coimage of a morphism is related to the concept of the cokernel.
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





