The Journal of Logic and Computation is an academic journal that focuses on the intersection of logic, computer science, and mathematics. It publishes high-quality research articles that explore various topics including, but not limited to, mathematical logic, computational logic, formal methods, algorithms, and theoretical computer science. The journal serves as a platform for researchers to disseminate their findings on how logical methods can be applied to computational problems, as well as how computational techniques can enhance the understanding of logic.
The Maximum Satisfiability Problem (Max-SAT) is an optimization variant of the Boolean satisfiability problem (SAT). In the standard SAT problem, the goal is to determine whether there exists an assignment of truth values (true or false) to a set of variables such that a given Boolean formula evaluates to true.
The raised fist is a symbol that has been used to represent solidarity, resistance, and strength in various social and political movements. Its origins can be traced back to labor movements in the early 20th century, but it gained widespread recognition during the civil rights movement and later within the Black Power movement in the United States during the 1960s and 1970s. The gesture is often associated with advocating for social justice, civil rights, and anti-racism.
Model checking is a formal verification technique used in computer science and systems engineering to systematically explore the states of a finite system model to verify whether certain properties hold. It is often applied to hardware and software systems, where the goal is to ensure that the system behaves correctly under all possible scenarios. Key components of model checking include: 1. **Model**: The system being verified is represented as a mathematical model. This model typically captures the system's states, transitions, and behaviors.
Model elimination is a strategy used in automated theorem proving, particularly within the context of first-order logic. It is a refutation-based approach that aims to establish the unsatisfiability of a set of clauses, thus proving the validity of a given statement. The key components of model elimination are: 1. **Refutation**: The objective is to show that a contradiction can be derived from a set of premises and a negation of the statement to be proved.
The Multi-Agent Programming Contest (MAPC) is an annual competition focused on the development of intelligent agents that can interact in a simulated environment. The contest typically attracts participants from various fields, including artificial intelligence, computer science, and robotics. In the contest, teams design and implement software agents that work autonomously or collaboratively to achieve specific goals within a predefined set of rules and objectives. Participants must navigate challenges related to decision-making, coordination, communication, and competition or cooperation with other agents.
A postcondition is a specific condition or set of conditions that must be true after the execution of a particular operation, function, or block of code. It is part of programming and formal verification practices, particularly within the context of software development and design by contract. In a contract-based programming model, a method or function is described with three main components: 1. **Preconditions**: Conditions that must be true before the function is executed.
A snow blower, also known as a snow thrower, is a machine used to remove snow from outdoor surfaces, such as driveways, sidewalks, and patios. It is designed to make snow removal more efficient and less labor-intensive compared to using a shovel. There are two main types of snow blowers: 1. **Single-stage snow blowers**: These are typically smaller and designed for light to moderate snowfalls.
The "Encyclopedia of the Philosophical Sciences" is a work by the German philosopher G.W.F. Hegel, first published in 1817. It serves as a comprehensive overview of Hegel's philosophical system, presenting his ideas on various fields of philosophy, including logic, nature, and spirit. The work is divided into three main sections: 1. **Logic**: This part deals with the nature of thought and knowledge, exploring concepts such as being, nothingness, and becoming.
Romanian logicians refers to a group of philosophers and mathematicians from Romania who have made significant contributions to the fields of logic, mathematics, and philosophy. Romania has a rich intellectual tradition in these areas, producing notable figures who have influenced both national and international discourse. Some well-known Romanian logicians include: 1. **Gheorghe Toma**: Known for contributions to mathematical logic and the foundations of mathematics.
English logicians are philosophers and scholars from England who have made significant contributions to the field of logic, particularly during the 19th and 20th centuries. These logicians have greatly influenced the development of formal logic, philosophical logic, and related areas such as linguistics, mathematics, and the philosophy of language.
Debranding is a marketing strategy that involves the removal or reduction of branding elements from a product or service in order to shift focus away from the brand itself. This approach can be utilized for various reasons, including: 1. **Consumer Perception**: By de-emphasizing brand labels and logos, companies may aim to create a more understated or minimalist image, appealing to consumers who prefer products that are less about brand prestige.
Digital on-screen graphics (OSG), often referred to as on-screen graphics or simply overlays, are visual elements that are displayed on the screen during a broadcast, livestream, or digital presentation. These graphics can include various types of information, such as: 1. **Text**: Titles, captions, subtitles, names, and other textual information relevant to the content being displayed.
A "Mon" (紋) is a traditional Japanese emblem or crest that is commonly associated with families, clans, and organizations. The term "mon" refers to a stylized design or symbol that represents a person's lineage, family heritage, or affiliation with a particular group. These emblems can feature various shapes, patterns, and motifs, often inspired by nature, animals, or historical events.
The Barrett–Crane model is a theoretical framework in quantum gravity, specifically within the context of loop quantum gravity. It was introduced by researchers John Barrett and Louis Crane in the mid-1990s as an attempt to define a quantum theory of geometry. The model is based on a combinatorial approach to spacetime, where the structure of space is represented using a spin network, a key concept in loop quantum gravity.
A closed timelike curve (CTC) is a concept from physics, specifically in the context of general relativity and theoretical physics. It refers to a type of path through spacetime that loops back on itself, allowing an object or observer to return to an earlier point in time.
Los Alamos National Security, LLC (LANS) is a private entity formed to manage and operate Los Alamos National Laboratory (LANL) in New Mexico, which is one of the key laboratories for the United States Department of Energy (DOE). Established in 2006, LANS is a partnership between several organizations, including University of California, Bechtel, and others. The laboratory plays a critical role in national security, scientific research, and technology development.
Kruskal–Szekeres coordinates are a specific set of coordinates used in the context of general relativity, particularly to describe the Schwarzschild solution, which describes the spacetime surrounding a spherically symmetric, non-rotating mass such as a black hole. These coordinates are particularly useful because they allow for a smooth and complete description of the Schwarzschild black hole, including regions that might be singular or undefined in standard Schwarzschild coordinates.
Minkowski space is a mathematical structure that combines the three dimensions of space with the dimension of time into a four-dimensional manifold. It is a fundamental concept in the field of special relativity, formulated by the mathematician Hermann Minkowski in 1907. In Minkowski space, the geometry is governed by the Minkowski metric, which differs from the familiar Euclidean metric used in classical three-dimensional space.
Spherically symmetric spacetime is a type of solution to the equations of general relativity that describes a gravitational field resulting from a mass distribution that is symmetric in all directions around a central point.

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