Minimal Seifert manifolds for higher ribbon knots
نویسنده
چکیده
We show that a group presented by a labelled oriented tree presentation in which the tree has diameter at most three is an HNN extension of a finitely presented group. From results of Silver, it then follows that the corresponding higher dimensional ribbon knots admit minimal Seifert manifolds. AMS Classification 57Q45; 20E06, 20F05, 57M05
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تاریخ انتشار 1997