Tarski–Grothendieck set theory, also known as Tarski–Grothendieck logic, is a foundational system for mathematics that extends classical set theory to better accommodate certain advanced concepts in category theory and algebraic geometry.
Biblical and Talmudic units of measurement are ancient systems used by the Hebrews in the Bible and later by Jewish scholars in the Talmudic period. These measurements were applied to various aspects of daily life, including land area, volume, weight, and distance. Here are some key units from these systems: ### Length: 1. **Cubits (Ammah)**: The standard cubit is approximately 18 inches (about 45.72 centimeters), although there were variations.
Frege's propositional calculus, developed by Gottlob Frege in the late 19th century, is one of the earliest formal systems in logic. It represents a significant milestone in the development of mathematical logic and formal reasoning. ### Key Features of Frege's Propositional Calculus: 1. **Propositions and Truth Values**: Frege's calculus deals with declarative sentences (propositions) that can be classified as either true or false.
"Logics for computability" generally refers to various formal systems and logical frameworks used to study computability, decidability, and related concepts in theoretical computer science and mathematical logic. This field intersects with areas such as recursion theory, model theory, and proof theory, focusing on the relationship between logic and computational processes.
Positive set theory is a mathematical framework that focuses on a constructive approach to sets, where the existence of sets is based on explicit constructions rather than classical existential proofs that rely on the law of excluded middle or other non-constructive principles. In this theory, emphasis is placed on the members of sets being constructively knowable or possessible.
Romania, like most countries, uses the International System of Units (SI), which is based on the metric system. Here are some common units of measurement used in Romania: 1. **Length**: - Meter (m) - Centimeter (cm) - Millimeter (mm) - Kilometer (km) 2. **Mass**: - Kilogram (kg) - Gram (g) - Milligram (mg) 3.
Pocket set theory is not a widely recognized term in mainstream mathematics or set theory. It might refer to a specific concept, system, or framework developed in a particular context or publication that is not widely known or established. Set theory itself is a branch of mathematical logic that studies sets, which are collections of objects. Concepts within set theory include operations on sets (like union, intersection, and difference), cardinality, and the study of infinite sets.
France uses the metric system as its official system of measurement, which is the most widely used system globally. Here are some of the key units of measurement in the French metric system: 1. **Length**: - Meter (m) - the basic unit of length. - Centimeter (cm) - 1/100th of a meter. - Millimeter (mm) - 1/1000th of a meter.
The National Physical Laboratory (NPL) of India is a premier research and development institution in the field of measurement science and standards. Established in 1947 and located in New Delhi, it operates under the aegis of the Council of Scientific and Industrial Research (CSIR). The primary functions of the NPL include: 1. **Measurement Standards**: NPL is responsible for establishing and maintaining national measurement standards, which serve as the basis for accurate and consistent measurements in various fields.
The term "FFF system" can refer to various concepts depending on the context, but one common usage is in relation to the **"FFF"** principle in logistics and supply chain management. The FFF acronym typically stands for: 1. **Fast**: Referring to the speed of delivery or processing. In a supply chain context, this means being able to quickly respond to customer demands and deliver products efficiently.
The geometrized unit system is a method of expressing physical quantities in such a way that some of the fundamental constants, particularly the speed of light \( c \) and the gravitational constant \( G \), are set to 1. This simplifies equations in theoretical physics, especially in general relativity and other fields where these constants frequently appear.
The history of measurement systems in India is a rich tapestry that reflects the country's cultural, scientific, and commercial evolution over millennia. Here's an overview: ### Ancient Period 1. **Indus Valley Civilization (c. 3300–1300 BCE)**: - The people of the Indus Valley had a sophisticated system of measurements. Archaeological findings suggest the use of standardized weights and measures for trade.
Abelian and Tauberian theorems are concepts from mathematical analysis and number theory, specifically related to the convergence of series and the properties of generating functions. Here’s a brief overview of each: ### Abelian Theorem The Abelian theorem typically refers to the Abel's test, which is a criterion for the convergence of series and power series.
The Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States refers to a series of proposals and actions aimed at standardizing the systems of currency, mass, and volume in the United States. This initiative was particularly influenced by the need for consistency across various states and the desire to simplify trade and commerce.
Technetium (99mTc) tetrofosmin is a radiopharmaceutical compound used primarily in nuclear medicine for diagnostic imaging, particularly in myocardial perfusion imaging (MPI). It is a technetium-labeled agent that targets the heart muscle, allowing for the evaluation of blood flow to the myocardium.
Technetium (99mTc) tilmanocept is a radiopharmaceutical used primarily in medical imaging. Specifically, it is used in lymphatic imaging to help visualize lymphatic pathways and lymph nodes in patients, particularly in the context of cancer diagnosis and surgical planning. Tilmanocept is a receptor-targeted imaging agent that binds to the mannose receptor, which is present on macrophages.
Troy weight is a system of weight measurement that is primarily used for precious metals, gemstones, and other high-value goods. It originated in the Late Middle Ages and has its roots in the Roman monetary system, with the term "troy" believed to derive from the city of Troyes in France, where many traders and merchants conducted business. The troy weight system is based on specific units: - 1 troy ounce (oz t) is equal to approximately 31.
The Unified Code for Units of Measure (UCUM) is a formal standard for representing units of measurement in a way that is unambiguous and computer-readable. Developed to promote interoperability in the exchange of data in health care and other fields, UCUM provides a system for specifying units that can be easily understood across different systems and applications. Key features of UCUM include: 1. **Precision and Clarity**: UCUM aims to eliminate ambiguity in unit representation.
Hsia Te-yu (also known as Hsiao Te-yu or Hsia Teyu) is a Taiwanese artist recognized for her unique contributions to contemporary art. She often explores themes related to identity, culture, and the intersection of personal and collective experiences through her work. Hsia's creations can encompass various mediums, including painting, installation, and mixed media.
A tape drive is a data storage device that uses magnetic tape as a medium for recording and storing data. Originally developed in the 1950s, tape drives have traditionally been used for data backup, archiving, and data transfer due to their high capacity and relatively low cost per gigabyte, especially in large-scale environments.

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