Approach Space
In topology, approach spaces are a generalization of metric spaces, based on point-to-set distances, instead of point-to-point distances. They were introduced by Robert Lowen in 1989.
Read more about Approach Space: Definition, Examples, Equivalent Definitions, Categorical Properties
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Beetles black approach not near;
Worm nor snail, do no offence.”
—William Shakespeare (1564–1616)
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