The \((2,3,7)\) triangle group, denoted as \(\Delta(2,3,7)\), is a type of discrete group that arises in the study of hyperbolic geometry and can be constructed as a group of isometries of hyperbolic space.

The Birmingham Solar Oscillations Network (BiSON) is a research initiative based at the University of Birmingham in the UK. It focuses on the study of solar oscillations, which are waves that travel through the Sun's interior and are a result of various physical processes, such as convection and magnetic fields. These oscillations provide valuable information about the Sun's structure and dynamics.

The 37th meridian east is a line of longitude that is 37 degrees east of the Prime Meridian, which runs through Greenwich, London. This meridian runs from the North Pole to the South Pole and crosses various countries and geographical features. Starting from the North, it passes through parts of eastern Europe, including Romania and Bulgaria, and continues through countries in Africa such as Egypt.

Boundary layers refer to a thin region of fluid (liquid or gas) that is affected by the presence of a solid surface, such as the surface of a wing, a pipe wall, or any other boundary where the fluid dynamics are influenced by that surface. This concept is crucial in the field of fluid mechanics and is particularly important in the study of aerodynamics and hydrodynamics. The boundary layer typically forms when a fluid flows over a surface.

TODO confirm, but looks like it, e.g. E. Coli starts DNA replication before the previous one finished.

A gene that was inherited from the same ancestor in two different species, and which has maintained the same function in both species.

Cabin pressurization refers to the process of maintaining a safe and comfortable pressure inside the cabin of an aircraft or spacecraft as it operates at high altitudes where the external atmospheric pressure is significantly lower than at sea level. The primary purpose of cabin pressurization is to ensure that passengers and crew can breathe comfortably and to prevent altitude-related health issues, such as hypoxia. At high altitudes, the air pressure is much lower, which means there is less oxygen available for breathing.

Weyl's inequality is a result in linear algebra and matrix theory concerning the eigenvalues of Hermitian (or symmetric) matrices. It relates the eigenvalues of the sum of two Hermitian matrices to the eigenvalues of the individual matrices. Let's denote two Hermitian matrices \( A \) and \( B \).

Aleatoricism is a term that refers to a technique or style in art and music where elements of chance or randomness are incorporated into the creative process. The word is derived from "aleatoric," which comes from the Latin word "aleatorius," meaning "pertaining to dice.

Aleksander Spivakovsky appears to be an individual associated with various contexts, but there may not be widely recognized or publicly available information about a notable figure by that name as of my last knowledge update in October 2023. It's possible that he could be related to a specific profession, academia, or a local context that isn't broadly covered in mainstream sources.

Alexis-Marie de Rochon was a French astronomer and scientist known for his contributions to the field of astronomy in the 18th century. He is particularly noted for his work in observational astronomy, where he made significant observations of celestial bodies and contributed to the understanding of planetary movements. Rochon is also known for his involvement in the scientific community of his time, participating in discussions and projects related to astronomy. His studies often focused on the measurement of celestial distances and the improvement of observational techniques.

Allvar Gullstrand was a Swedish ophthalmologist and a Nobel Prize laureate born on June 5, 1862, and he passed away on July 28, 1930. He is best known for his work in the field of vision and optics.

As of my last knowledge update in October 2021, Allan Birnbaum is not a widely recognized public figure or term in mainstream discourse. It's possible that he might be an individual known within specific contexts, such as academia, local community, arts, or other fields, but detailed information about him isn't readily available.

Shashikumar Chitre is a notable Indian astrophysicist known for his contributions to the field of astrophysics and astronomy. He has made significant advancements in areas such as stellar dynamics and cosmic structure. In addition to his scientific work, Chitre has been involved in various educational and public outreach initiatives to promote scientific understanding and interest in astronomy.

The term "American astronomer stubs" likely refers to short or incomplete articles on American astronomers found on platforms like Wikipedia. In the context of Wikipedia, a "stub" is an article that is considered too short to provide a comprehensive overview of its subject. These stubs typically need to be expanded with more information, such as the astronomers' contributions to the field, notable discoveries, biographies, and other relevant details.

Artificial Neural Networks (ANNs) are computational models inspired by the way biological neural networks in the human brain operate. They consist of interconnected groups of artificial neurons, where each neuron acts as a processing unit that takes in input, applies a transformation, and produces an output. Here are the key components and concepts related to ANNs: ### Key Components 1. **Neurons**: The basic processing units in an ANN, analogous to biological neurons.

C. Barry Carter is a prominent figure in the field of materials science, particularly known for his work in electron microscopy and materials characterization. He is a professor at the University of Portland and has authored or co-authored several influential texts and publications on the subject. One of his notable works is the book "Transmission Electron Microscopy: A Textbook for Materials Science," which is widely used in both academic and research settings.