Definisjon av open set

Vi fant 3 definisjoner av open setengelsk.

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Substantiv

open set - Informally, a set such that the target point of a movement by a small amount in any direction from any point in the set is still in the set; exemplified by a full circle without its boundary.
open set - A set which can be described as an arbitrary union of open balls. Equivalently, a set such that for every point in it, there is an open ball centered at that point, such that that open ball is contained by the set.
open set - Most generally, a member of the topology of a given topological space.

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