Notes for AKT-091008-1/0:38:26
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Sketch of the proof (Claim 1) Thicken the diagram [math]\displaystyle{ \rightarrow }[/math] surface with boundary (with a copy of [math]\displaystyle{ D }[/math] embedded) [math]\displaystyle{ \rightarrow }[/math] glue discs along boundary components [math]\displaystyle{ \rightarrow }[/math] closed surface with a copy of [math]\displaystyle{ D }[/math]
