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| | iqexpand.com (Site not responding. Last check: 2007-10-07) |
 | | If (M, d) is a metric space, a closed ball is a set of the form D(x; r) := {y in M : d(x, y) ≤ r}, where x is in M and r is a positive real number, the radius of the ball. |
 | | If (M, d) is a metric space and S is a subset of M, the diameter of S is the supremum of the distances d(x, y), where x and y range over S. |
 | | Topology glossary This is a glossary of some terms used in the branch of mathematics known as topology. |
| topology_glossary.iqexpand.com (4558 words) |
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