![](/files/happy5.png)
Which outer reloids are equal to inner ones
Warning: This formulation is vague (not exact).
Question Characterize the set
. In other words, simplify this formula.
![$ \{f\in\mathsf{FCD} \mid (\mathsf{RLD})_{\mathrm{in}} f=(\mathsf{RLD})_{\mathrm{out}} f\} $](/files/tex/34d9c3297cb0be1b9acecdb9c1e6f77c599cfc91.png)
The problem seems rather difficult.
See Algebraic General Topology for definitions of used concepts.
Bibliography
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