Polyhedral interpolation theorems
Let H and K be disjoint closed sets, in a topological space X, and let C be a closed set, disjoint from H and K. If X – C is the union of two disjoint open sets, containing H and K respectively, then C separates H from K (in X).
KeywordsSpherical Shell Closed Path Solid Torus Regular Neighborhood Splitting Operation
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