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What (who) is cylinder covering - definition
TYPE OF COMPUTATIONAL PROBLEM
Covering Problem; Covering problem; Rainbow covering
Covering group
CONCEPT IN TOPOLOGICAL GROUP THEORY
Universal covering group; Covering homomorphism; Double covering group; Lattice of covering groups; Abelian covering
In mathematics, a covering group of a topological group H is a covering space G of H such that G is a topological group and the covering map is a continuous group homomorphism. The map p is called the covering homomorphism.
Single-cylinder engine
![[[DKW]] RT 250 (1952–1953) motorcycle engine](https://commons.wikimedia.org/wiki/Special:FilePath/2007-05-20 3 DKW RT 250 in Mendig (kl).JPG?width=200 "[[DKW]] RT 250 (1952–1953) motorcycle engine")
![Villiers]] engine in a 1959 [[Bond Minicar]]](https://commons.wikimedia.org/wiki/Special:FilePath/Bond minicar engine bay 1959.jpg?width=200 "Villiers]] engine in a 1959 [[Bond Minicar]]")
![Yamaha SRX600]] (1985–1997) motorcycle engine](https://commons.wikimedia.org/wiki/Special:FilePath/Detail view of a large single-cylinder air-cooled motorcycle engine.jpg?width=200 "Yamaha SRX600]] (1985–1997) motorcycle engine")
PISTON ENGINE WITH ONE CYLINDER
Single cylinder; Single-cylinder; One-cylinder engine; One cylinder engine; 1 cylinder; Single cylinder engine
A single-cylinder engine, sometimes called a thumper, is a piston engine with one cylinder. This engine is often used for motorcycles, motor scooters, go-karts, all-terrain vehicles, radio-controlled vehicles, portable tools and garden machinery (such as lawnmowers, cultivators, and string trimmers).
Covering space
![Intuitively, a covering locally projects a "stack of pancakes" above an [[open neighborhood]] <math>U</math> onto <math>U</math>](https://commons.wikimedia.org/wiki/Special:FilePath/Covering space diagram.svg?width=200 "Intuitively, a covering locally projects a \"stack of pancakes\" above an [[open neighborhood]] <math>U</math> onto <math>U</math>")
TYPE OF CONTINUOUS MAP IN TOPOLOGY
Universal cover; Universal covers; Universal Cover; Universal covering; Deck transformation group; Universal covering space; Deck transformation; Galois covering; Covering map; Covering transformation; Covering maps; Double cover (topology); Deck transformations; Universal coverings; Galois theory of covering spaces; Simply connected covering; Regular covering; Regular cover; Regular covering group
A covering of a topological space X is a continuous map \pi : E \rightarrow X with special properties.
Wikipedia
Covering problems
In combinatorics and computer science, covering problems are computational problems that ask whether a certain combinatorial structure 'covers' another, or how large the structure has to be to do that. Covering problems are minimization problems and usually integer linear programs, whose dual problems are called packing problems.
The most prominent examples of covering problems are the set cover problem, which is equivalent to the hitting set problem, and its special cases, the vertex cover problem and the edge cover problem.
