541132 Leleākūhonua is a trans-Neptunian object (TNO) located in the Kuiper Belt, a region of the solar system beyond the orbit of Neptune that is populated with many small bodies. It was discovered on 30 November 2010 and is classified as a centaur due to its dynamic orbit that crosses the orbits of the giant planets.
It seems like you might be referring to "spiral sections," but if you meant "spiric sections," that term does not have a widely recognized definition in mathematics or related fields.
The World-Wide Standardized Seismograph Network (WWSSN) was an important global initiative established to improve the detection and analysis of seismic activities around the world. Initiated in the 1960s, the WWSSN aimed to create a uniform system of seismograph stations that could reliably measure and record seismic waves produced by earthquakes, volcanic activity, and even nuclear detonations.
"Serbian statisticians" could refer to either statisticians from Serbia, who work in various fields related to statistics, or to a range of statistical data and outputs that are relevant to Serbia. Serbian statisticians may be involved in academic research, government statistical agencies, private industry, or non-profit organizations, contributing to areas such as economics, health, social sciences, and more.
Serbian geophysicists are scientists from Serbia who specialize in geophysics, which is the study of the Earth’s physical properties and processes. This field encompasses a variety of disciplines, including seismology, magnetic and gravitational studies, geodesy, and exploration geophysics, among others. Geophysicists in Serbia may work on a range of issues, including earthquake monitoring and research, mineral and energy resource exploration, environmental studies, and geological hazard assessment.
Portuguese military aircraft serials typically follow a specific format that reflects the service branch and the type of aircraft. The Portuguese Air Force (Força Aérea Portuguesa, FAP) uses a numbering system for its aircraft that often includes a combination of letters and numbers. 1. **Fighter Aircraft**: Usually assigned a serial number that may combine a letter prefix with a numerical designation.
In the United Kingdom, military aircraft serial numbers are used to identify and register military aircraft. These serial numbers are typically issued by the Ministry of Defence (MoD) and follow specific formats depending on the type and service of the aircraft. Here are some common formats for UK military aircraft serial numbers: 1. **Royal Air Force (RAF) Serial Numbers**: RAF aircraft serial numbers usually consist of a letter followed by five numbers, for example, "XX12345".
Serial composition is a method of music composition that involves the use of a series, or a fixed order of elements, to structure a piece of music. This technique is closely associated with 20th-century avant-garde music, particularly the work of composers such as Arnold Schoenberg, Alban Berg, and Anton Webern, who were part of the Second Viennese School.
Lisl Gaal is a Hungarian-born actress, singer, and dancer known for her work in film, television, and theater. She was notably active in the entertainment industry in the mid-20th century, particularly known for her roles in the film industry during the 1950s and 1960s.
Sophie Piccard is not a widely recognized name or term, and there may be several individuals with that name in various contexts.
Mikhail Suslin was a prominent Russian mathematician, best known for his contributions to set theory and topology, particularly for his work on the theory of real numbers and the Suslin line. Born on April 2, 1894, Suslin played a significant role in developing concepts related to measure theory and the foundation of mathematics.
Gunungan is a significant element in Wayang, the traditional Indonesian puppet theater that has deep cultural roots, particularly in Java. The term "Gunungan" translates to "mountain" in English, and it often symbolizes the mystical mountain or the axis mundi, representing the spiritual connection between the earth and the heavens. In Wayang performances, the Gunungan is used as a backdrop or a transition device between scenes.
Key quote that names the chapter:
My friend Matt Sands was once going to write a book to be called Alfred Nobel's Other Mistake.
Lorentz force by Ciro Santilli 40 Updated 2025-07-16
Equation 1.
Lorentz force
.
A little suspicious that it bears the name of Lorentz, who is famous for special relativity, isn't it? See: Maxwell's equations require special relativity.
The geometry of divisors is a topic in algebraic geometry that deals with the study of divisors on algebraic varieties, particularly within the context of the theory of algebraic surfaces and higher-dimensional varieties. A divisor on an algebraic variety is an algebraic concept that intuitively represents "subvarieties" or "subsets", often associated with codimension 1 subvarieties, such as curves on surfaces or hypersurfaces in higher dimensions.
E. T. Paull refers to Edward Thomas Paull, an American composer and music publisher active in the late 19th and early 20th centuries. He is known for his contributions to popular music and for publishing a wide range of compositions, particularly piano music and arrangements of popular songs. Some of his works gained popularity during his time, and he played a significant role in the music publishing industry, helping to promote many composers and their music.
Robert Lienau is known for his contributions to the publishing field, particularly in the context of music. He was involved in music publishing and may be recognized for his work related to composers and their scores.

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