http://openproblemgarden.org/op/unsolvability_of_word_problem_for_2_knot_complements Comments for "Unsolvability of word problem for 2-knot complements" en http://openproblemgarden.org/op/unsolvability_of_word_problem_for_2_knot_complements <table cellspacing="10"> <tr> <td> Author(s): <a href="/category/gordon">Gordon</a>&nbsp;&nbsp; </td> <td align=right> Subject: <a href="/topology">Topology</a>&nbsp;&nbsp; </td> </tr> <tr> <td colspan=2> <table border=1 cellspacing="5"> <tr><td> <div class="envtheorem"><b>Problem</b>&nbsp;&nbsp; Does there exist a smooth/PL embedding of <img class="teximage" src="/files/tex/1cd459995f11529f346339e6879cf139c22ee92c.png" alt="$ S^2 $" /> in <img class="teximage" src="/files/tex/8973308b8ba6ed78524b0e4751ab814bbaaa57e2.png" alt="$ S^4 $" /> such that the fundamental group of the complement has an unsolvable word problem? </div> </tr></td> </table> </td> </tr> </table> Gordon 2-knot Computational Complexity knot theory Topology http://openproblemgarden.org/op/unsolvability_of_word_problem_for_2_knot_complements#comment Fri, 23 Jul 2010 19:34:26 +0200 rybu 37237 at http://openproblemgarden.org