# Real analysis negations

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Give formal negations of the following definitions:

* Limit point. Your answer should be in the form: "A point p in X is NOT a limit point of the set E in X if ... "

* Interior point. Your answer should be in the form: "A point p in X is NOT an interior point of the set E in X if ... "

* Closed set. Your answer should be in the form: "A set E in X is NOT closed if ... "

* Open set. Your answer should be in the form: "A set E in X is NOT open if ... "

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##### Solution Summary

This shows how to give negations of definitions in real analysis.

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