Savitch's theorem is a result in computational complexity theory that relates the complexity classes \( \text{NL} \) (nondeterministic logarithmic space) and \( \text{L} \) (deterministic logarithmic space).
The Sipser–Lautemann theorem is a result in the field of computational complexity theory that addresses the relationship between complexity classes, particularly focusing on the class of languages recognized by nondeterministic polynomial time machines (NP) and certain probabilistic polynomial time machines (BPP).
G. Evelyn Hutchinson (1903–1991) was a prominent British ecologist and limnologist, widely regarded as one of the founders of modern ecology. He is best known for his significant contributions to the understanding of ecosystems, population dynamics, and biogeochemistry. Hutchinson's work helped lay the foundations for the study of freshwater ecosystems and the interactions between organisms and their environments.
The Valiant–Vazirani theorem is a result in theoretical computer science concerning the complexity of certain problems in the context of randomized algorithms. Specifically, it relates to the complexity class NP (nondeterministic polynomial time) and the concept of zero-knowledge proofs.
Beck's theorem, in the context of geometry, generally refers to a result in the field of combinatorial geometry related to point sets and convex shapes. More specifically, it states that for any finite set of points in the plane, there exists a subset of those points that can be covered by a convex polygon of a certain size, where the size is influenced by the dimension of the space.
Radon's theorem is a result in convex geometry that deals with the intersection of convex sets. Specifically, it states that: **Radon's Theorem:** If a set of \( d + 2 \) points in \( \mathbb{R}^d \) is given, then it is possible to partition these points into two non-empty subsets such that the convex hulls (the smallest convex sets containing the points) of these two subsets intersect.
The Graph Structure Theorem is a significant result in graph theory that characterizes certain classes of graphs. Specifically, it provides a structural decomposition of a broad class of graphs known as "H-minor-free graphs." This theorem states that if a graph does not contain a fixed graph H as a minor, then it can be decomposed into a bounded number of simpler components that exhibit certain structural properties.
Grinberg's theorem is a result in the field of topology and specifically pertains to the properties of continuous mappings between topological spaces. It is often mentioned in the context of compact spaces and homeomorphisms. The theorem states that if \( X \) is a compact Hausdorff space and \( Y \) is a connected space, then every continuous surjective mapping from \( X \) onto \( Y \) is a quotient map.
Schnyder's theorem, or Schnyder's realizability theorem, is a result in graph theory that relates to the representation of planar graphs. It states that: **Every simple planar graph can be embedded in the plane such that its vertices can be labeled with numbers from {0, 1, 2, 3} so that the edges of the graph respect certain ordering conditions.
The Edge-of-the-Wedge theorem is a concept from complex analysis, specifically regarding holomorphic functions. It deals with the behavior of these functions on regions in the complex plane that have "wedge-shaped" domains.
The Mermin-Wagner theorem is a result in statistical mechanics and condensed matter physics that addresses the behavior of certain types of physical systems at low temperatures, specifically those defined by continuous symmetry. The theorem, which was formulated by N. D. Mermin and H. Wagner in the 1960s, states that in two-dimensional systems with continuous symmetry, spontaneous symmetry breaking and long-range order cannot occur at finite temperatures.
As of my last knowledge update in October 2023, Clare Yu is a physicist known for her work in the field of experimental condensed matter physics. Her research often involves the study of materials at the nanoscale and their properties. She has contributed to advancing the understanding of different materials, particularly in areas related to quantum phase transitions and topological materials.
The Cayley–Bacharach theorem is a result in algebraic geometry that deals with the intersection of divisors on a projective space. It is particularly relevant in the study of linear systems of divisors and their properties. In its classical form, the theorem states the following: Let \( C \) be a non-singular irreducible curve of degree \( d \) in the projective plane \( \mathbb{P}^2 \).
D'Arcy Wentworth Thompson (1860–1948) was a Scottish biologist, mathematician, and classicist known for his work in the fields of morphometrics and biological modeling. He is best remembered for his influential book, "On Growth and Form," published in 1917, in which he explored the mathematical and physical principles underlying the shapes and forms of living organisms.
Arthur Winfree (1926–2002) was an influential American mathematician and biophysicist known for his work in the field of nonlinear dynamics, particularly in the study of biological rhythms and chaos theory. He is perhaps best known for his contributions to the understanding of the dynamics of oscillatory systems, including the mathematical modeling of biological rhythms such as circadian and cardiac rhythms.
George Oster is a biologist known for his work in the field of evolutionary biology and biomechanics. He has conducted research on topics such as the mechanics of animal movement and the evolutionary implications of physical structures in organisms. Oster's contributions include both fundamental research and applied studies that enhance the understanding of how physical principles govern biological processes.
Gerard Verschuuren is a name that may refer to various individuals, but most prominently, he is known as a Dutch author and educator. His work spans topics such as philosophy, science, and education. Verschuuren has also engaged in discussions about the intersection of science and religion, addressing themes related to creationism and evolution.
Mary Lou Zeeman is a mathematician known for her work in the field of mathematics education, particularly in the areas of mathematical modeling, applied mathematics, and the visualization of mathematical concepts. She has been involved in various initiatives to improve mathematics teaching and learning, often emphasizing the importance of understanding mathematical ideas through context and real-life applications. Additionally, Zeeman has contributed to professional development for educators and has published research related to mathematics education.
Jacqueline McGlade is a prominent scientist and environmentalist known for her work in marine ecology, environmental science, and biodiversity. She has held significant positions, including serving as the Chief Scientist and Director of the European Environment Agency (EEA). McGlade has focused on issues related to environmental monitoring, climate change, and sustainable development. In addition to her scientific research, she has also been involved in policy-making and advocating for the integration of scientific knowledge into environmental management and decision-making processes.
Radon hexafluoride (RnF₆) is a chemical compound of radon, a noble gas, and fluorine. It is one of the few known compounds containing radon. In this compound, one radon atom is bonded to six fluorine atoms, which makes it a fluorinated derivative. Radon itself is colorless, odorless, and radioactive, and it is typically found in trace amounts in the environment.
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





