Correlated electrons refer to electrons in a material that exhibit strong interactions with each other, leading to collective behavior that cannot be adequately described by treating them as independent particles. In systems of interacting electrons, the motions and states of individual electrons become dependent on one another, resulting in complex phenomena that are not captured by the simple principles of non-interacting particle physics.
Laboratory techniques in condensed matter physics involve various experimental methods used to study the properties and behaviors of condensed matter systems, which include solids and liquids. These techniques aim to investigate the microscopic and macroscopic characteristics of materials, often at the atomic or molecular level.
Cultural depictions of Aristotle span a wide range of mediums, including literature, visual arts, theater, philosophy, and popular culture. Aristotle, the ancient Greek philosopher, has been portrayed in various ways, influenced by historical context, philosophical trends, and the evolution of thought over centuries. Here are some notable aspects of his cultural depictions: 1. **Art and Sculpture**: Aristotle has been depicted in numerous artworks throughout history.
Giordano Bruno, the Italian philosopher, mathematician, and cosmological theorist, has been depicted in various cultural contexts over the years. His life and ideas, particularly his views on the universe, infinity, and religious orthodoxy, have inspired a wide range of representations in literature, film, theater, and art.
Marie Curie, the pioneering physicist and chemist known for her groundbreaking work on radioactivity, has been depicted in various cultural mediums including literature, film, theater, and visual arts. These depictions often focus on her scientific achievements, personal struggles, and the impact she had on the fields of science and gender equality.
Wernher von Braun, a significant figure in the history of rocketry and space exploration, has been depicted in various cultural contexts, reflecting his complex legacy as both a pioneering scientist and a controversial figure due to his involvement with the Nazi regime during World War II. 1. **Films and Documentaries**: Von Braun has been portrayed in several films and documentaries that highlight his contributions to space exploration.
Discrete geometry is a branch of mathematics that studies geometric objects and properties in a discrete setting, as opposed to continuous geometry. It focuses on structures that are made up of distinct, separate elements rather than continuous shapes or surfaces. This can include the study of points, lines, polygons, polyhedra, and more complex shapes, particularly in finite or countable settings.
Astronomical dynamical systems is a field of study in celestial mechanics that focuses on the motion of celestial bodies under the influence of gravitational forces. It combines concepts from physics, mathematics, and astronomy to understand how objects in space, such as planets, moons, asteroids, and stars, interact with each other and evolve over time. Key aspects of astronomical dynamical systems include: 1. **Orbital Mechanics**: This involves the study of the orbits of celestial bodies.
In dynamical systems, "theorems" refer to established results that describe the behavior of systems over time under certain conditions. Dynamical systems are mathematical models used to describe the evolution of points in a given space according to specific rules, often represented by differential equations or discrete mappings.
Complex dynamics is a branch of mathematics that studies the behavior of dynamical systems in the context of complex numbers. It typically involves the iteration of complex functions, particularly polynomials and rational functions, and explores the patterns and structures that emerge from these iterations. Key concepts in complex dynamics include: 1. **Iteration**: Complex dynamics often focuses on iterating a function, meaning applying the function repeatedly.

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