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Gordon
Unsolvability of word problem for 2-knot complements โ โ โ
Author(s): Gordon
Problem Does there exist a smooth/PL embedding of
in
such that the fundamental group of the complement has an unsolvable word problem?
![$ S^2 $](/files/tex/1cd459995f11529f346339e6879cf139c22ee92c.png)
![$ S^4 $](/files/tex/8973308b8ba6ed78524b0e4751ab814bbaaa57e2.png)
Keywords: 2-knot; Computational Complexity; knot theory
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