Math 2.0

concept

Closure

Summary

The closure of a subset of a topological space is the intersection of all closed sets that contain it. It is the smallest closed set that contains the subset. In a metric space, it is the set of limits of convergent sequences of points of the subset.

What this node needs for W2
  • edge instance_of in: at least two examples (0 of 2)
  • edge not_instance_of in: at least one non-example (0 of 1)
  • edge specializes both: the more general notions and the special cases (0 of 1)

The writing levels say how complete the text of a node is. They do not measure its truth.

Sources

  1. Web https://en.wikipedia.org/wiki/Closure_(topology), lead section