The Single-Crossing Condition (SCC) is a concept used primarily in economics, particularly in the context of auction theory, mechanism design, and social choice theory. It refers to a specific property of preference orderings among different agents or individuals regarding a set of alternatives. Under the Single-Crossing Condition, the preference rankings of the individuals (or types) can only cross at most once when plotted against a single dimension of preference.
Céa's lemma by Wikipedia Bot 0
Céa's lemma is a result in the field of functional analysis and calculus of variations, particularly in the context of optimal control problems. The lemma is often used to derive estimates for the behavior of solutions to variational problems. In a general sense, Céa's lemma states that under certain conditions, the error in the approximation of a functional can be controlled in terms of the norm of a corresponding linear functional applied to the error of the function.
Grönwall's inequality is an important result in the field of differential equations and analysis, particularly useful for establishing the existence and uniqueness of solutions to differential equations. It provides a way to estimate functions that satisfy certain integral inequalities. There are two common forms of Grönwall's inequality: the integral form and the differential form.
Lions–Magenes lemma is a result in the field of functional analysis, particularly in the context of Sobolev spaces and partial differential equations. It provides a crucial tool for establishing the regularity and control of solutions to elliptic and parabolic differential equations. The lemma is typically used to handle boundary value problems, allowing one to obtain estimates of solutions in various norms, which is essential for understanding the existence and uniqueness of solutions as well as their continuity and differentiability properties.
Weyl's lemma is a result in the theory of partial differential equations, particularly concerning solutions to the Laplace equation. The lemma states that if a function \( u \) is harmonic (i.e.
R. K. Rubugunday by Wikipedia Bot 0
R. K. Rubugunday does not appear to be a widely recognized name or term in any notable context. It is possible that it could refer to a specific individual, location, or term that is less commonly known or might have emerged after my last training cut-off in October 2021.
The Lifting-the-exponent lemma (LTE) is a mathematical result in number theory that provides conditions under which the highest power of a prime \( p \) that divides certain expressions can be easily determined. It simplifies the computation of \( v_p(a^n - b^n) \) and related expressions, where \( v_p(x) \) denotes the p-adic valuation, which gives the exponent of the highest power of \( p \) that divides \( x \).
Nine dots puzzle by Wikipedia Bot 0
The Nine Dots Puzzle is a classic brain teaser that challenges individuals to think outside the box. The puzzle consists of a grid of nine dots arranged in three rows of three, forming a square. The goal is to connect all nine dots using four straight lines or fewer without lifting your pencil or retracing any lines. The challenge lies in the common assumption that the lines must stay within the confines of the square formed by the outer dots.
Schild's Ladder by Wikipedia Bot 0
Schild's Ladder is a conceptual framework used in the field of physics, particularly in the context of quantum field theory and the study of particle interactions. It is named after the physicist J. Schild, who proposed this model. The key idea behind Schild's Ladder is to provide a systematic method for constructing effective field theories.
Spaceland (novel) by Wikipedia Bot 0
"Spaceland" is a science fiction novel written by Rudy Rucker, first published in 2002. The story is inspired by Edwin A. Abbott's classic novella "Flatland," which explores dimensions and geometric concepts through the experiences of a two-dimensional being in a flat world. In "Spaceland," Rucker expands on these themes by introducing a three-dimensional character, a mathematician named "Jake" who can perceive and interact with beings from higher dimensions.
The Wild Numbers by Wikipedia Bot 0
"The Wild Numbers" is a novel by the author Barry W. O'Connell, published in 2009. The book blends themes of mathematics, philosophy, and the human experience, exploring the relationship between mathematical concepts and the complexities of life. Through its narrative, it may delve into ideas about patterns, numbers, and their significance in understanding the world around us.
Lewis Carroll, the pen name of Charles Lutwidge Dodgson, is best known for his literary works "Alice's Adventures in Wonderland" and "Through the Looking-Glass." The characters in these stories are whimsical, imaginative, and often nonsensical, reflecting Carroll's unique style and playful use of language.
"Alice in Wonderland" is a musical adaptation of Lewis Carroll's classic novels "Alice's Adventures in Wonderland" and "Through the Looking-Glass." Various adaptations have been created over the years, but one of the more notable ones was developed by composer Frank Wildhorn and lyricist Gregory Boyd, which premiered in the late 2000s. The musical features a blend of songs and original storytelling, taking audiences through the whimsical and often nonsensical world that Alice encounters.
All Saints' Church, Daresbury, is an Anglican church located in Daresbury, Cheshire, England. The church has historical significance and is known for its beautiful architecture, which reflects different styles from various periods of its construction and renovation. Daresbury is also notable for its associations with Lewis Carroll, the author of "Alice's Adventures in Wonderland," who was born in the village.
Charlie Lovett by Wikipedia Bot 0
Charlie Lovett is an American author known for his works of fiction, particularly mystery novels and literary fiction. He often incorporates themes of book collecting, literature, and bibliophilia into his stories. Lovett's most notable works include "The Bookman's Tale," "First Impressions," and "The Lost Book of the Grail." He has a background in literature and a deep appreciation for classic books, which is reflected in his writing.
Dodgson condensation, named after the British mathematician Charles Lutwidge Dodgson (also known as Lewis Carroll), is a technique in combinatorial mathematics applied to determinants, particularly in the context of matrices. It is a method for computing determinants by reducing the size of a matrix through a process of manipulation, which involves selecting specific entries from the determinant.
Gertrude Chataway by Wikipedia Bot 0
Gertrude Chataway is not widely recognized as a public figure or historical personality in general knowledge up to October 2023. It is possible that she may be a character in literature, a lesser-known individual, or someone who has gained attention in a specific field or context that hasn't been widely covered. If you have more specific information or context regarding Gertrude Chataway, I would be glad to help with that!
Isa Bowman by Wikipedia Bot 0
As of my last update in October 2023, "Isa Bowman" doesn't refer to a widely recognized concept, person, or brand. It is possible that it could be a name or term that has gained significance after that date or is specific to a niche context.
The Lewis Carroll Shelf Award is an honor established in 1976 to recognize and promote outstanding children's books that embody the spirit of imagination and creativity exemplified by Lewis Carroll, the author of "Alice's Adventures in Wonderland" and "Through the Looking-Glass." This award celebrates books that are imaginative, original, and able to capture the interest of young readers.
Sherry L. Ackerman is an author and educator known for her work in the areas of philosophy, education, and personal development. She has written several books and articles that explore themes related to individual growth, self-awareness, and the philosophical underpinnings of education. Her work often emphasizes the importance of holistic approaches to learning and personal transformation.

Pinned article: ourbigbook/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