Unsolved problems in mathematics refer to questions or conjectures that have not yet been proven or disproven despite significant effort from mathematicians. These problems span various fields of mathematics, including number theory, algebra, geometry, and analysis. Some of these problems have been known for many years, while others are more recent.

"Complete variety" refers to a concept in the field of economics, particularly in the context of consumer choice and market analysis. It generally describes a situation in which a consumer has access to all possible varieties or types of a good or service. This allows consumers to choose products that best match their preferences and needs. In a market with complete variety, consumers can find differing attributes (such as size, color, quality, and brand) in products, offering them a comprehensive selection to meet diverse preferences.

The Broer-Kaup equations are a system of partial differential equations that describe long wave interactions in shallow water waves, particularly focusing on the evolution of small amplitude waves in a two-dimensional medium. These equations arise in the context of studying wave phenomena in various physical systems, including fluid dynamics and nonlinear wave interactions. The Broer-Kaup system can be derived from the incompressible Euler equations under certain approximations and is characterized by its ability to model the evolution of wave packets and their interactions over time.

Homogeneity blockmodeling is a technique used in network analysis and social network analysis to identify and categorize groups (or blocks) of nodes (individuals, organizations, etc.) that exhibit similar characteristics or patterns in their relationships. The fundamental idea is to simplify the complex structure of a network by grouping nodes into blocks that provide a clearer understanding of the overall relationships within the network.

Astronomers can specialize in various fields of research, each focusing on different aspects of the universe and its phenomena. Here are some common fields of research within astronomy: 1. **Observational Astronomy**: This involves collecting and analyzing data from telescopes and other instruments to study celestial objects and events. Subfields may include radio, optical, and infrared astronomy. 2. **Theoretical Astronomy**: Theoretical astronomers use mathematical models and simulations to explain astronomical phenomena and to make predictions.

The Belle II experiment is a high-energy particle physics experiment located at the SuperKEKB accelerator facility in Tsukuba, Japan. It is the successor to the original Belle experiment, which operated from 1999 to 2010 and made significant contributions to our understanding of particle physics, especially in the study of B mesons.

Ammunition refers to the material used in firearms, artillery, and other weaponry that is designed to be discharged as projectiles. It typically includes various components, such as: 1. **Projectile**: The actual bullet or shell that is fired from the weapon. 2. **Propellant**: Usually a type of gunpowder or other explosive material that provides the force to propel the projectile.

"Priest of Nature" is a term that can refer to a few different concepts, depending on the context. In gaming, specifically in the context of tabletop role-playing games like Dungeons & Dragons or similar settings, it may refer to a character class or archetype that specializes in nature-based magic and abilities.

"The Copernican Revolution: Planetary Astronomy in the Development of Western Thought" is a significant work by the historian of science Thomas S. Kuhn, published in 1957. In this book, Kuhn examines the historical and philosophical implications of the Copernican model of the solar system, which proposed that the Earth and other planets revolve around the Sun, challenging the long-held geocentric model that placed the Earth at the center of the universe.

Aram Arutyunov is not a widely known public figure or concept, and there might not be substantial information readily available about him.

Peter Thrower is a notable figure in the field of materials science and engineering, particularly known for his work in the areas of metallurgy and materials processing. He has published numerous papers and books related to the mechanical properties of materials, specifically focusing on topics such as plasticity and the behavior of materials under various conditions.

The T-criterion, also known as the T-test, is a statistical method used to determine if there are significant differences between the means of two groups or a single group's mean compared to a known value. It is commonly employed in hypothesis testing to assess whether the observed data deviates significantly from the null hypothesis, which typically states that there is no effect or no difference.

Nim is a high-level, statically typed programming language designed for efficiency, expressiveness, and versatility. It combines elements from various programming paradigms, including procedural, functional, and object-oriented programming. Key features of Nim include: 1. **Performance**: Nim compiles to efficient C, C++, or JavaScript code, allowing for high-performance applications while still providing the expressive benefits of a high-level language.