منابع مشابه
Signature Invariants of Links from Irregular Covers and Non-abelian Covers
Abstract. Signature invariants of odd dimensional links from irregular covers and non-abelian covers of complements are obtained by using the technique of Casson and Gordon. We show that the invariants vanish for slice links and can be considered as invariants under Fm-link concordance. We illustrate examples of links that are not slice but behave as slice links for any invariants from abelian ...
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We investigate the following problem: Given two embeddings G1 and G2 of the same abstract graph G on an orientable surface S, decide whether G1 and G2 are isotopic; in other words, whether there exists a continuous family of embeddings between G1 and G2. We provide efficient algorithms to solve this problem in two models. In the first model, the input consists of the arrangement of G1 (resp., G...
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ژورنال
عنوان ژورنال: Geometriae Dedicata
سال: 2014
ISSN: 0046-5755,1572-9168
DOI: 10.1007/s10711-014-9986-y