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theorem proved term proof

linking_requires_D3

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formal statement (Lean)

 292theorem linking_requires_D3 (D : Dimension) :
 293    SupportsNontrivialLinking D → D = 3 :=

proof body

Term-mode proof.

 294  (alexander_duality_circle_linking D).mp
 295
 296/-- D = 1 does not support linking (collinear — curves cannot be disjoint). -/

used by (6)

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depends on (5)

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