SkyTran is a proposed transportation system that aims to provide high-speed, efficient, and sustainable urban transit solutions using small, pod-like vehicles that run on elevated guideways. The concept envisions a network of these pods that can transport passengers smoothly above existing roadways, alleviating ground-level traffic congestion. SkyTran vehicles are designed to be highly automated and capable of operating on a demand-responsive basis, meaning they can be called upon as needed rather than following a fixed schedule.
The Southern Illinois Salukis men's basketball program has a rich history, and various players have excelled in different statistical categories over the years. The statistical leaders typically include categories like points, rebounds, assists, steals, and blocks.
In geometry, a lens is a shape formed by the intersection of two circular arcs. Specifically, it is the region bounded by two circles that overlap. The area enclosed by these arcs resembles the shape of a lens, which is the reason for its name. There are two main types of lenses: 1. **Convex Lens**: This occurs when both arcs are part of circles that are convex towards each other. The resulting lens shape bulges outward.
John von Neumann was a pioneering mathematician, physicist, computer scientist, and polymath whose contributions have inspired numerous concepts, theories, and entities. Here’s a list of notable things named after him: 1. **Von Neumann Architecture**: A computer architecture design model that outlines a system where a single memory space stores both data and instructions.
Von Neumann is a large lunar impact crater located on the Moon's surface, named after the famous mathematician and physicist John von Neumann. It is situated in the eastern part of the Moon's near side, near the edge of the Oceanus Procellarum (Ocean of Storms).
Shape Modeling International (SMI) is an annual academic conference focused on research in the field of shape modeling and related areas. It aims to bring together researchers, practitioners, and industry professionals to discuss advancements in the understanding, representation, and manipulation of shapes in various contexts, including computer graphics, computer-aided design (CAD), and geometric modeling.
A **copositive matrix** is a special type of matrix that arises in the context of optimization and mathematical programming, particularly in the study of quadratic forms and convexity. A symmetric matrix \( A \) is said to be copositive if for any vector \( x \) in the non-negative orthant \( \mathbb{R}^n_+ \) (i.e.
Reindeer, also known as caribou in North America, have a distribution that primarily spans the Arctic and Subarctic regions. Their populations are found across the northern parts of Europe, Asia, and North America. Here are some key points on their distribution: 1. **Habitat**: Reindeer are adapted to cold environments and are typically found in tundra, boreal forests, and alpine regions.
Zero Population Growth (ZPG) refers to a statistical condition in which a population's size remains constant over time, meaning that the number of births is equal to the number of deaths, leading to no net growth. This concept is often used in discussions about sustainable development and environmental impact.
Optimized Consumer Intensity Analysis (OCIA) is a method used primarily in the context of market research, consumer behavior analysis, and business strategy. While the term may not be widely standardized across all industries, it generally relates to analyzing how intensely consumers engage with a product or brand, and it aims to optimize this engagement for better business outcomes.
Pseudospectral optimal control is a mathematical and computational approach used to solve optimal control problems. It combines the principles of pseudospectral methods with optimal control theory to find control inputs that minimize or maximize a given cost function while satisfying dynamic constraints defined by differential equations.
Tikhonov's Theorem is a result in the theory of dynamical systems that pertains to the behavior of the long-term solutions of differential equations. Specifically, it deals with the asymptotic behavior of solutions to certain classes of dynamical systems.
Asymptotic freedom is a property of some gauge theories, particularly quantum chromodynamics (QCD), which is the theory describing the strong interactionthe force that binds quarks and gluons into protons, neutrons, and other hadrons. The concept refers to the behavior of the coupling constant (which measures the strength of the interaction) as the energy scale of the interaction changes.
Helicity in particle physics refers to the projection of a particle's spin onto its momentum vector. It is a way to characterize the intrinsic angular momentum of a particle relative to its direction of motion.
The history of quantum field theory (QFT) is a rich and complex narrative that spans much of the 20th century and beyond. It involves the development of ideas stemming from both quantum mechanics and special relativity, eventually leading to a theoretical framework that describes how particles and fields interact. Here’s a general overview: ### Early 20th Century Foundations 1.
Quantum field theory (QFT) is a fundamental framework in theoretical physics that combines classical field theory, special relativity, and quantum mechanics. Various quantum field theories describe different fundamental interactions and particles in the universe. Here’s a list of some of the most notable quantum field theories: ### 1. Quantum Electrodynamics (QED) - Describes the interaction between charged particles and electromagnetic fields. - Quantum field theory of electromagnetic interactions. ### 2.
The Khatri–Rao product is a mathematical operation used in multilinear algebra and tensor algebra, particularly in the context of matrices and tensors. It is a generalization of the Kronecker product to matrices.
The Matrix Determinant Lemma is a useful result in linear algebra that relates the determinant of a matrix that has been modified by adding an outer product to the determinant of the original matrix. Specifically, it provides a way to compute the determinant of a modified matrix in terms of the determinant of the original matrix.
The Eilenberg–Mazur swindle is a technique in category theory and algebraic topology used to show that certain objects can be manipulated in a way that results in unexpected behaviors, particularly in the context of homological algebra. Specifically, it's often applied to demonstrate that certain abelian groups or modules can be considered "equivalent" by constructing a specific kind of isomorphism that leads to counterintuitive results.
In category theory, the term "lemma" is not a formal term with a specific definition, but rather refers to a proposition or statement that is proved and used as an aid in the proof of a larger theorem. In the context of mathematical writing, lemmas serve to break down complex arguments into smaller, more manageable parts.

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