The **binomial approximation** refers to several mathematical ideas involving binomial expressions and the binomial theorem. Most commonly, it is used in the context of approximating probabilities and simplifying calculations involving binomial distributions or binomial coefficients.
The Binomial distribution is a discrete probability distribution that models the number of successes in a fixed number of independent Bernoulli trials (experiments with two possible outcomes, often termed "success" and "failure"). This type of distribution is particularly useful in situations where you want to determine the likelihood of a certain number of successes within a series of trials.
The binomial series is a way to express the expansion of a binomial expression raised to a power. Specifically, it provides the expansion of the expression \((a + b)^n\) for any real (or complex) number \(n\).
The Extended Negative Binomial Distribution, sometimes referred to in some contexts as the Generalized Negative Binomial Distribution, is a statistical distribution that generalizes the standard negative binomial distribution. The standard negative binomial distribution typically models the number of failures before a specified number of successes occurs in a sequence of independent Bernoulli trials.
Falling and rising factorials are two mathematical concepts often used in combinatorics and algebra to describe specific products of sequences of numbers. They are particularly useful in the context of permutations, combinations, and polynomial expansions. Here's an overview of both: ### Falling Factorials The falling factorial, denoted as \( (n)_k \), is defined as the product of \( k \) consecutive decreasing integers starting from \( n \).
The term "fibonomial coefficient" refers to a mathematical concept that combines elements from both Fibonacci numbers and binomial coefficients. It is defined in relation to the Fibonacci sequence, which is a series of numbers where each number (after the first two) is the sum of the two preceding ones. The fibonomial coefficient is typically denoted as \( \binom{n}{k}_F \) and is defined using Fibonacci numbers \( F_n \).
The pseudogamma function is a mathematical function that generalizes the concept of the gamma function. While the traditional gamma function, denoted as \(\Gamma(z)\), is defined for complex numbers with a positive real part, the pseudogamma function can be used in a wider context, particularly in the field of number theory and special functions. One common interpretation of the pseudogamma function is based on the notion of providing alternatives or approximations to the gamma function.
The Sierpiński triangle, also known as the Sierpiński gasket or Sierpiński sieve, is a fractal and attractive fixed set with an overall shape that resembles an equilateral triangle. It is constructed through a recursive process that involves removing smaller triangles from a larger triangle. Here’s how it is usually created: 1. **Start with an equilateral triangle**: Begin with a solid equilateral triangle.
The Portable Document Format (PDF) is a file format developed by Adobe that allows documents to be presented in a manner independent of application software, hardware, and operating systems. Here’s a brief history of PDF: ### Early Development - **1980s**: The concept of a portable document format originated in the late 1980s. Adobe co-founder John Warnock initiated the idea to create electronic documents that could be easily shared across different systems and platforms.
In measure theory, **content** is a concept used to generalize the idea of a measure for certain sets, particularly in the context of subsets of Euclidean spaces. While measures, such as Lebesgue measure, are defined for a broader class of sets and satisfy certain properties (like countable additivity), content is often used for more irregular sets that may not have a well-defined measure under the Lebesgue measure. **Key Aspects of Content:** 1.
Cake-cutting refers to a problem and methodology in fair division, particularly in the context of allocating resources among multiple parties. It is often illustrated with the analogy of dividing a cake (or any divisible good) among several individuals in a way that each person believes they have received a fair share. The main goals of cake-cutting are to ensure fairness and avoid conflicts during the division process.
Fair division of a single homogeneous resource refers to the process of allocating a divisible and uniform resource—such as land, money, or goods—among multiple recipients in a way that is perceived as fair by all involved parties. The goal is to ensure that each participant receives a share that is equitable based on certain criteria or preferences.
No-justified-envy matching is a concept from the field of economics and game theory that deals with matching markets, such as job markets or school assignments, where individuals (such as workers or students) are matched to positions (such as jobs or schools) based on preferences and some form of evaluation or ranking. The idea of "no-justified-envy" refers to a condition where an individual cannot justify their envy towards another individual's match.
In the context of mathematics, particularly in the field of representation theory, a **finite character** refers to a homomorphism from a group (often a finite group or a compact group) into the multiplicative group of non-zero complex numbers (or into a field). Characters are used to study the representations of groups, particularly in the context of finite groups and their representations over the complex numbers.

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