Alexander Duality, Gropes and Link Homotopy
Alexander Duality, Gropes and Link Homotopy
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亚历山大对偶、格罗普斯和链接同伦
DOI:
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
P. Teichner
中科院分区:
文献类型:
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作者:
Vyacheslav Krushkal;P. Teichner
We prove a geometric renement of Alexander duality for certain 2{complexes, the so-called gropes, embedded into 4{space. This renement can be roughly formulated as saying that 4{dimensional Alexander duality preserves the disjoint Dwyer ltration. In addition, we give new proofs and extended versions of two lemmas of Freedman and Lin which are of central importance in the A-B{slice problem ,t he main open problem in the classication theory of topological 4{manifolds. Our methods are group theoretical, rather than using Massey products and Milnor {invariants as in the original proofs. AMS Classication numbers Primary: 55M05, 57M25 Secondary: 57M05, 57N13, 57N70