A volume mesh is a 3D representation of a geometric domain that divides the space into smaller, simpler shapes called elements, which are used in numerical simulations, such as finite element analysis (FEA), computational fluid dynamics (CFD), and other engineering applications. The primary purpose of creating a volume mesh is to enable the numerical solution of partial differential equations that describe physical phenomena, such as fluid flow, heat transfer, or structural behavior.
Trend surface analysis is a spatial analysis technique used in geography, geostatistics, and various fields dealing with spatial data. It helps to identify and model the underlying patterns and trends within spatial data sets by fitting a mathematical function to a set of observed data points. The main objective is to create a continuous surface that represents the spatial distribution of a variable of interest.
Transversality conditions are mathematical constraints used primarily in the field of optimal control theory and calculus of variations. They ensure that solutions to optimization problems—particularly those involving differential equations—are well-defined and meet certain criteria at the endpoints of the optimization interval. In a typical setting, when optimizing a functional that involves a continuous state variable over a specified interval, the transversality condition helps to determine the behavior of the control (or path) at the boundary points.
Transfinite interpolation is a mathematical technique used to create a continuous surface or function that passes through a given set of points, typically in a multidimensional space. It extends the concept of interpolation beyond finite-dimensional spaces to infinite-dimensional or higher-dimensional contexts. The technique is particularly useful in the context of geometric modeling, computer graphics, and numerical analysis. The key idea is to define a function that satisfies certain properties at specified boundary points (or control points) while allowing for continuity and smoothness in the interpolation.
A tachytrope is a term used to describe a type of optical illusion or a visual device that creates the appearance of motion through sequential frames or images. The term can sometimes be associated with devices similar to a zoetrope, which is a device that produces the illusion of motion by displaying a rapid sequence of static images. The concept of a tachytrope can be explored through various art forms, animations, and media that engage with the dynamic representation of movement.
Symlet is a family of wavelets used in signal processing and data analysis. They are a type of wavelet that was developed as a modification of the Daubechies wavelets, which are known for their compact support and orthogonality properties. Symlets are specifically designed to be symmetrical (or nearly symmetrical) and have better symmetry properties than the original Daubechies wavelets, making them particularly useful for certain applications, especially in image processing and denoising.
A strictly determined game is a type of two-player zero-sum game in which each player has a clear and linear strategy that leads to a specific outcome based on the strategies chosen by both players. In such games, there is a unique equilibrium strategy for both players, meaning that there is one optimal strategy that each player can follow that guarantees the best possible outcome for themselves, regardless of what the other player does.
Streamline diffusion is a concept often used in fluid dynamics and related fields to describe the movement of particles or substances within a fluid flow. It refers to the process by which particles or molecules distribute themselves along the streamlines of a flow. In more specific terms, streamline diffusion is typically associated with the way substances diffuse within a moving fluid, influenced by the flow's velocity and direction.
Stephen Childress is likely a reference to a specific individual, but without more context, it's difficult to determine exactly who you are referring to as there are multiple individuals with that name.
A steerable filter is a type of image processing filter that can be rotated or "steered" to different orientations to enhance or detect features in an image, such as edges or textures. This concept is useful in various applications, including computer vision, image analysis, and pattern recognition. ### Key Characteristics of Steerable Filters: 1. **Orientation Selectivity**: Steerable filters can adapt their response based on the orientation of the features in the image.
The **Squeeze operator** is a mathematical concept primarily used in the field of quantum mechanics, quantum optics, and quantum information science. It refers to a specific type of quantum state transformation that reduces the uncertainty (or noise) in one observable while increasing it in another, thereby "squeezing" the quantum state in a particular direction in phase space.
Spheroidal wave functions arise in the solutions to the spheroidal wave equation, which is a type of differential equation encountered in various fields such as quantum mechanics and electromagnetic theory. They are particularly useful in problems involving potentials that are not entirely spherical but have a prolate (elongated) or oblate (flattened) shape.
The term "small control property" is often discussed in the context of functional analysis and operator theory. It pertains to a specific characteristic of certain types of Banach spaces or functional spaces. A space is said to have the small control property if, roughly speaking, every bounded linear operator from this space into a Hilbert space can be approximated by finite-rank operators in a certain way.
The Sievert integral is a concept used in the study of the solubility of gases in liquids and is particularly important in the fields of physical chemistry and materials science. Named after the Swedish physicist Lars Fredrik Sievert, it describes how the concentration of a gas in a liquid varies with the partial pressure of that gas above the liquid. The Sievert integral represents the relationship between the amount of gas that can dissolve in a liquid and the pressure of that gas.
The term "Shekel function" may refer to a specific mathematical function used in optimization problems, particularly within the field of benchmark functions for testing optimization algorithms. The Shekel function is often utilized to evaluate the performance of such algorithms due to its well-defined characteristics, including having multiple local minima.
The Seneca Effect is a concept that describes how complex systems tend to collapse or decline rapidly after a period of growth or stability, despite often showing a more gradual rise. Named after the Stoic philosopher Seneca the Younger, who famously stated, "It is not how we make mistakes, but how we correct them that defines us," the term is often used in discussions of economics, environmental science, and social dynamics. The Seneca Effect highlights the asymmetrical nature of growth and decline in systems.
A self-concordant function is a specific type of convex function that has properties which make it particularly useful in optimization, especially in the context of interior-point methods.
Schwinger parametrization is a technique used in quantum field theory and theoretical physics to rewrite certain types of integrals, particularly those that involve propagators or Green's functions. This method allows for a more amenable form of integration, especially in the context of loop integrals or when evaluating Feynman diagrams.
The SYZ conjecture, named after mathematicians Shing-Tung Yau, Richard S. Palais, and Andrew Strominger, is a conjecture in the field of mirror symmetry and algebraic geometry. Specifically, it pertains to the relationship between Calabi-Yau manifolds and their mirror pairs.

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 5. . 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.
  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