| Concept definition: |
The limits of a <REGION>; that is, a <NON_EMPTY_SET> of <LOCATION>s characterized by the fact that any <LOCATION> included in the <NON_EMPTY_SET> is arbitrarily near to <LOCATION>s that are not contained in the given <REGION> as well as to <LOCATION>s that are contained in the given <REGION>; boundary. |
