National Archives/ 20802254 Blankets are common, but not universal, to humans during sleep, at least in the modern day. In topology, covers are a powerful means of investigating various geometric properties of sets. bed cover synonyms, bed cover pronunciation, bed cover translation, English dictionary definition of bed cover. A Red Cross nurse change the sheets on a patient’s bed, 1917. Thus, the multiplicity of finite covers makes it possible to characterize the number of dimensions of a space. We say that the multiplicity of a cover of a given set does not exceed n if every point of the set belongs to no more than n sets of the cover. Hence, the importance of the concept of the multiplicity of a cover. Similarly, when a space is filled with brickwork, the bricks can be made to border only in fours the borderings cannot be only in threes. Thus, a town square can be covered with arbitrarily small paving blocks in such a way that the stones in the pavement will border only in threes borderings in threes cannot be avoided. If the diameter of each of the sets of a cover is smaller than a given positive ∊, the cover is called an ∊-cover.įor any ∊ > 0, a bounded region permits of a finite ∊-cover by closed sets with at most three sets intersecting at a time, but it permits of no such cover, for a sufficiently small ∊, with only two sets intersecting at a time. Fusion Painted Hard Fold Truck Bed Tonneau Cover AR12002L-G7C Fits 2015 - 2021 Chevy/GMC Colorado/Canyon 5' Bed (61.7'), Paint Code: G7C Pull Me Over Red 2 1,64899 More Buying Choices 1,560. Finite covers-that is, covers consisting of a finite number of elements -are usually considered. Featured from the store UNDERCOVER A.R.E. Lock and Key Set, Tonneau Cover Replacement Parts, Classic Cover, 2XXR Key Code, Set. For example, the diagonal of a rectangle divides it into two triangles that form a cover of the given rectangle. UnderCover Tonneau Cover Replacement Parts RSAS1002CL. (or covering), a collection of point sets (geometric figures) whose union forms or contains a given set (or given figure).
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