A "cake number" refers to a concept in combinatorial mathematics related to how many pieces a cake can be divided into with a given number of straight cuts. Specifically, the "cake number" is defined as the maximum number of pieces into which a cake can be divided using \( n \) straight cuts in three-dimensional space.
An elliptic divisibility sequence (EDS) is a sequence of integers that arises from the theory of elliptic curves and has interesting divisibility properties. These sequences are generated based on the coordinates of points on an elliptic curve, typically given in Weierstrass form. The properties of EDSs are linked to the arithmetic of elliptic curves, particularly their group structure.
A factorial prime is a specific type of prime number that can be expressed in the form \( n! \pm 1 \), where \( n! \) represents the factorial of a non-negative integer \( n \). The two forms are \( n! - 1 \) and \( n! + 1 \). For example: - For \( n = 0 \): \( 0!
Goodstein's theorem is a result in mathematical logic and number theory that deals with a particular sequence of natural numbers known as Goodstein sequences. The theorem states that every Goodstein sequence eventually terminates at 0, despite the fact that the terms of the sequence can grow extremely large before reaching 0. To understand Goodstein's theorem, we first need to define how a Goodstein sequence is constructed: 1. **Starting Point**: Begin with a natural number \( n \).
A home prime is a concept in number theory that relates to the representation of numbers as sums of prime numbers. Specifically, a home prime is produced by repeatedly factoring a composite number into its prime factors, then concatenating those prime factors (written in order), and repeating the process until a prime number is obtained. Here’s how it works in detail: 1. Start with a composite number. 2. Factor it into its prime factors.
Integer complexity is a concept in number theory that refers to the minimum number of ones needed to express a positive integer \( n \) using just addition, multiplication, and parentheses. The complexity of an integer is denoted as \( C(n) \). For example: - The integer \( 1 \) has a complexity of \( C(1) = 1 \) because it can be represented as simply using one "1".
The Katydid sequence, also known as the "katydid word sequence," is a specific sequence of numbers defined by a recursive process based on the number of syllables in the word "katydid." The word "katydid" has three syllables, which influences the way the sequence is constructed. To generate the Katydid sequence: 1. Start with the first term as \( a_1 = 1 \).
The Ordered Bell number is a concept in combinatorial mathematics that counts the number of ways to partition a set into a certain number of non-empty ordered subsets. More formally, the \( n \)-th Ordered Bell number, denoted as \( B_n^{o} \), gives the number of ways to partition a set of size \( n \) into \( k \) non-empty subsets, where the order of the subsets matters.
A **square-free integer** is an integer that is not divisible by the square of any prime number. In other words, a square-free integer cannot have any prime factor raised to a power greater than one in its prime factorization. For example: - The integer 30 is square-free because its prime factorization is \(2^1 \times 3^1 \times 5^1\); none of the prime factors are squared or higher.
The term "unusual number" can have various meanings depending on the context in which it is used, as it is not a standard mathematical term. Here are a few interpretations that could apply: 1. **Mathematical Context**: In some mathematical discussions, "unusual" might refer to numbers that exhibit unique or rare properties.
100,000,000 is a number that represents one hundred million. It can also be expressed in scientific notation as \(1 \times 10^8\). In terms of everyday quantities, it might refer to financial figures, population counts, or any large metric in various contexts.
The number 1023 is an integer that comes after 1022 and before 1024. It can be expressed in various contexts: 1. **Mathematical Properties**: - It is an odd number. - It can be expressed in binary as 1111111111, which means it is \(2^{10} - 1\), indicating it is one less than a power of two (specifically, \(2^{10} = 1024\)).
An "almost integer" typically refers to a number that is very close to an integer but not exactly one. In various mathematical contexts, this concept can arise in discussions of numerical approximations, rounding, or certain sets of numbers that are nearly whole but slightly off. For example, numbers like 4.999, 2.001, or -3.9999 are considered almost integers because they are very close to the integers 5, 2, and -4, respectively.
The term "power of three" can refer to a couple of different concepts depending on the context: 1. **Mathematical Context**: In mathematics, a power of three refers to any number that can be expressed as \(3^n\), where \(n\) is an integer.
A **repunit** is a type of number that consists entirely of the digit 1 repeated one or more times. The term "repunit" comes from "repeated unit.
A Liouville number is a type of real number that is particularly significant in the field of number theory, especially in the study of transcendental numbers.
In the context of sports, "number" typically refers to a numerical designation worn by players on their uniforms. This number serves several purposes, including: 1. **Identification**: Players are often identified by their jersey numbers, which help fans, officials, and commentators recognize them during games. 2. **Statistics**: Numbers can also relate to various statistics, such as points scored, goals made, or other performance metrics specific to the sport.
A brass catcher is a device used by shooters to collect spent cartridge casings after firing a firearm. It is particularly useful for those who reload ammunition, as it helps save the brass for reuse. Brass catchers come in various designs, including mesh bags that can be attached to the firearm or stand-alone containers that sit on the ground. These devices typically feature a funnel or a netting system that captures the casings as they are ejected from the firearm.
A **provable prime** is a type of prime number for which its primality can be verified through a mathematical proof or algorithm. This term is often used in the context of cryptography and computational number theory, where the efficiency and certainty of primality testing are crucial. In practice, proving a number is prime can be done through various algorithms, such as: 1. **AKS primality test**: A polynomial-time algorithm that can definitively determine if a number is prime.
The **Cancionero de Palacio** is a notable collection of Spanish poetry and song, dating from the late 15th to the early 16th century. It was compiled during the reign of King Ferdinand II of Aragon and Queen Isabella I of Castile, the Catholic Monarchs. The collection is significant for preserving a wide variety of lyrical compositions, including both folk songs and more courtly works, showcasing the rich musical and poetic culture of the time.

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