http://openproblemgarden.org/op/which_homology_3_spheres_bound_homology_4_balls Comments for "Which homology 3-spheres bound homology 4-balls?" en http://openproblemgarden.org/op/which_homology_3_spheres_bound_homology_4_balls <table cellspacing="10"> <tr> <td> Author(s): <a href="/category/ancient_folklore">Ancient/folklore</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; Is there a complete and computable set of invariants that can determine which (rational) homology <img class="teximage" src="/files/tex/4aaf85facb6534fd470edd32dbdb4e28f6218190.png" alt="$ 3 $" />-spheres bound (rational) homology <img class="teximage" src="/files/tex/1f1498726bb4b7754ca36de46c0ccdd09136d115.png" alt="$ 4 $" />-balls? </p> </div> </tr></td> </table> </td> </tr> </table> Ancient/folklore cobordism homology ball homology sphere Topology http://openproblemgarden.org/op/which_homology_3_spheres_bound_homology_4_balls#comment Sat, 07 Nov 2009 01:12:14 +0100 rybu 37145 at http://openproblemgarden.org