Mathematics fiction is a genre of literature that incorporates mathematical concepts, theories, or themes into its narrative. These books often explore the intersection of mathematics with human experiences, philosophy, and the nature of reality. Some key characteristics of mathematics fiction include: 1. **Mathematical Concepts**: The stories may revolve around mathematical ideas, such as infinity, chaos theory, topology, or non-Euclidean geometry.

Sudoku is a logic-based puzzle that typically consists of a 9x9 grid, which is divided into nine 3x3 subgrids or regions. The objective of the game is to fill the grid in such a way that every row, every column, and every 3x3 subgrid contains all the digits from 1 to 9 without any repetition.

KY-68 is a type of ballistic missile that was developed by North Korea. It is believed to be a short-range missile variant that can be launched from mobile platforms, making it more difficult to detect and intercept. The KY-68 is thought to be part of North Korea's ongoing efforts to enhance its military capabilities and defense systems.

In mathematics, particularly in the field of complex analysis, the term "prime end" refers to a concept used in the study of conformal mappings and, more generally, in the theory of Riemann surfaces and potential theory. The notion was introduced by the mathematician Henri Poincaré. **Prime Ends**: Prime ends can be thought of as a way to extend the notion of boundary points in a domain in the complex plane.

Blowing snow refers to snow that is lifted and carried by the wind, resulting in reduced visibility and potentially hazardous conditions. This phenomenon typically occurs during or after a snowfall when strong winds blow loose, powdery snow from the ground. There are two main types of blowing snow: 1. **Suspended Blowing Snow**: This occurs when snowflakes or ice crystals are lifted and remain suspended in the air, creating a snow haze and significantly reducing visibility.