A **quadratic quadrilateral element** is a type of finite element used in numerical methods, especially in finite element analysis (FEA) for solving partial differential equations. Quadrilateral elements are two-dimensional elements defined by four vertices, while "quadratic" indicates that the shape functions used to represent the geometry and solution within the element are quadratic functions, as opposed to linear functions used in linear elements.
Regularity theory is a concept that can appear in various fields, including mathematics, physics, economics, and computer science, among others. Its interpretation and application can vary widely depending on the discipline. 1. **Mathematics**: In mathematics, particularly in analysis and differential equations, regularity theory examines the solutions to partial differential equations (PDEs) and seeks to determine the conditions under which solutions possess certain smoothness properties.
The term "singularity spectrum" can refer to a few different concepts in various fields, particularly in mathematics and physics. However, one of the primary contexts in which the term is commonly used is in the study of fractals and dynamical systems, particularly in relation to measures of distributions of singularities in functions or signals.
A **superelement** is a concept used in structural analysis and finite element methods (FEM) in engineering, particularly in the context of large scale problems. It refers to a simplified representation of a set of elements or a subsystem that captures the essential behavior of that system while reducing computational complexity.
Bertram Martin Wilson is not a widely recognized figure in public discourse or popular culture as of my last knowledge update in October 2021. It’s possible that he could be a person of interest in a specific field, such as academia, literature, or another domain that might not have received broad attention.
Clarence Raymond Adams, often known as C. Raymond Adams or simply Raymond Adams, was an American neurologist known for his significant contributions to neurology and neuropathology. He is particularly recognized for his work in understanding diseases of the nervous system and has published extensively in this field. His research has helped advance the understanding of various neurological disorders.
In fluid dynamics and potential flow theory, a "unit doublet" is a mathematical construct used to model a specific type of flow. It consists of two equal and opposite point sources (or point vortices) very close together, effectively creating a dipole-like effect in the flow field.
Wiener amalgam spaces are a type of function space used in harmonic analysis and the study of partial differential equations. They comprehensively blend properties of both local and global function spaces, allowing for the analysis of functions that exhibit both rapidly decaying behavior and certain oscillatory features.
Alberto González Domínguez could refer to a number of individuals, but without additional context, it's difficult to determine exactly who you are referring to. The name might be associated with various people in different fields such as academia, politics, arts, or sports.
Aleksei Markushevich is a name that may not be widely recognized in mainstream discourse or popular culture as of my last knowledge update in October 2023. It's possible that he could be a person involved in a specific field such as academia, arts, or a niche area of research.
As of my last knowledge update in October 2021, there isn't a widely known figure or concept named "Anatolii Goldberg." It's possible that he could be a private individual, a less-public figure, or a subject that has gained prominence after this date. If you meant someone specific or if there is a particular context, such as a field (e.g.
Alexandru Ghika could refer to several notable figures, mainly in Romanian history, such as members of the Ghika family, which played a significant role in the country's political and cultural life. The Ghika family is known for its connections to the Romanian nobility, with several members serving as rulers, politicians, and diplomats.
Anatoly Karatsuba is a Russian mathematician and computer scientist best known for his contributions to the fields of number theory and algorithm design. He is particularly famous for developing the Karatsuba algorithm in 1960, which is an efficient algorithm for multiplying large integers.
Antonio Maria Bordoni is an Italian scientist known for his contributions to the fields of telecommunications, electronics, and signal processing. His work often focuses on the development of protocols and technologies related to mobile communication and network systems.
As of my last update in October 2023, "Daniel Rider" might refer to a few different things depending on the context, such as a person, a character, or a term from a specific field. However, there isn't widely recognized or impactful information specific to "Daniel Rider" that stands out across various domains.
Edoardo Vesentini may refer to a contemporary Italian figure, but without additional context, it’s unclear whether you're asking about a person, a company, or something else.
Eduard Heine (1821-1881) was a German mathematician known for his contributions to various areas of mathematics, including number theory and algebra. He is particularly noted for his work in the theory of functions and the development of Heine's formulas, which involve special functions and series. His contributions also include research in complex analysis and approximation theory. While Heine may not be as widely known as some of his contemporaries, his work laid important foundations for later developments in mathematics.
The term "Becky Parker" does not refer to a widely recognized or specific entity, person, or concept as of my last knowledge update in October 2023. It could possibly refer to a person, character, or a niche topic that is not widely known.
Guillaume de l'Hôpital (1661–1704) was a French mathematician best known for his work in calculus. He is particularly famous for the rule named after him, known as L'Hôpital's Rule, which is used to find the limit of indeterminate forms such as 0/0 or ∞/∞.
Edwin Hewitt most likely refers to a notable mathematician known for his work in functional analysis, particularly in the context of measure theory and related areas. He may be associated with contributions in various mathematical fields, including topology and integration theory.

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