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This category contains results about Discontinuities.
Definitions specific to this category can be found in Definitions/Discontinuities.

Let $T_1$ and $T_2$ be topological spaces.

Let $f: T_1 \to T_2$ be a mapping from $T_1$ to $T_2$.

Let $D \in T_1$ be an element of $T_1$ such that $f$ is discontinuous at $D$.

Then $D$ is called a discontinuity (on $f$).

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