Buffon's needle is a probabilistic problem that involves dropping a needle of a certain length onto a plane with parallel lines drawn at regular intervals. The problem was first posed by the French mathematician Georges-Louis Leclerc, Comte de Buffon, in the 18th century. Here's the set-up of the problem: 1. **Needle and Lines**: Imagine a plane with equally spaced parallel lines that are a distance \( d \) apart.
The Birthday Problem, also known as the Birthday Paradox, refers to a counterintuitive probability puzzle that deals with the likelihood of two or more people sharing the same birthday in a group. The problem is commonly stated as follows: In a group of \( n \) people, what is the probability that at least two of them share the same birthday?
Banach's matchbox problem is a classic problem in measure theory and probability theory that illustrates intriguing ideas about measure, probability, and the structure of sets. The problem is named after the Polish mathematician Stefan Banach. The problem can be stated loosely as follows: 1. **Consider a collection of matches** (or any similar items arranged in a box) that are numbered from 1 to infinity, representing an infinite sequence of distinct elements.
Amplitude-shift keying (ASK) is a digital modulation technique used in telecommunications. It conveys digital information through variations in the amplitude of a carrier wave. In ASK, the amplitude of the carrier signal is changed to represent binary data, typically 0s and 1s. ### Key Features of Amplitude-shift Keying: 1. **Modulation Process**: In ASK, different amplitudes of the carrier signal are used to represent different binary states.
Statistical mechanics is a branch of theoretical physics that connects the microscopic properties of individual atoms and molecules to the macroscopic properties of materials and systems. It provides a framework for understanding thermodynamics in terms of the behavior of large numbers of particles, allowing for predictions about bulk properties based on the statistical behavior of microscopic states.
Gambling mathematics refers to the application of mathematical concepts and principles to analyze various aspects of gambling. This field covers a wide range of topics, including probability, statistics, combinatorics, and game theory, all of which help in understanding the risks, strategies, and returns associated with gambling activities. Here are some key elements of gambling mathematics: 1. **Probability**: This is the foundation of gambling mathematics.
Expected utility is a fundamental concept in decision theory and economics that provides a framework for evaluating choices under uncertainty. It is based on the idea that individuals make decisions by considering the potential outcomes of their choices, each associated with its likelihood of occurring, and assigning a utility value to each outcome. Here's a breakdown of the main components of expected utility: 1. **Outcomes**: These are the different possible results of a decision or action.
Randomness has a wide array of applications across various fields and disciplines. Here are some of the key applications: 1. **Cryptography**: Random numbers are essential for secure encryption methods. They are used to generate keys, nonces, and initialization vectors, ensuring the security of communications and data. 2. **Statistics**: Random sampling is used to obtain representative samples from a population, critical for surveys and experiments to ensure unbiased results and valid conclusions.
Wave maps are a mathematical generalization of classical wave equations that take into account the geometry of the target space into which the wave is mapping. The wave map equation describes the evolution of fields that take values in a Riemannian manifold (the target space) from a spacetime (the source space), often described in terms of time and spatial dimensions.
Ward's conjecture is a statement in number theory concerning the distribution of prime numbers. Specifically, it pertains to the existence of infinitely many prime numbers of the form \( n^2 + k \), where \( n \) is a positive integer and \( k \) is a fixed integer. The conjecture asserts that for each positive integer \( k \), there are infinitely many integers \( n \) such that \( n^2 + k \) is prime.
The W. T. and Idalia Reid Prize is an award given by the American Mathematical Society (AMS) that recognizes outstanding research in the field of mathematics. Established in honor of W. T. Reid, a prominent mathematician, and his wife Idalia Reid, the prize aims to support and encourage mathematical research, particularly for individuals who demonstrate significant achievement in their work. The specific criteria and focus of the prize may vary, but generally, it promotes the importance of innovative contributions to mathematical sciences.
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.

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