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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

A ZETA FUNCTION FOR FLOWS WITH L(−1,−1) TEMPLATE

AL-Hashimi, Ghazwan Mohammed 01 December 2016 (has links) (PDF)
In this dissertation, we study the flows on R3 associated with a nonlinear system differential equation introduced by Clark Robinson in [46]. The periodic orbits are modeled by a semi-flow on the L(−1,−1) template. It is known that these are positive knots, but need not have positive braid presentations. Here we prove that they are fibered. We investigate their linking and we construct a zeta-function that counts periodic orbits according to their twisting. This extends work by M. Sullivan in [55], and [57].
12

Some Fibred Knots with Bi-orderable Knot Groups

Lu, Wangshan January 2007 (has links)
<p>This project aims to give an overview of knots, orderability of knot groups, and to construct knots for which the knot groups enjoy some nice properties.</p> <p>To accomplish this, we first present some preliminary results concerning knots and knot groups. We then introduce the Alexander polynomial, and explain the idea of a special polynomial originally introduced by Linnell, Rhemtulla and Rolfsen. By investigating the conditions on a special polynomial, we classify all the special Alexander polynomial of fibred knots of degree less than 10. Finally we construct examples of fibred knots which have a special Alexander polynomial.</p> / Master of Science (MS)
13

Les invariants de Links-Gould comme généralisations du polynôme d’Alexander / The Links-Gould invariants as generalizations of the Alexander polynomial

Kohli, Ben-Michael 23 November 2016 (has links)
On s’intéresse dans cette thèse aux rapports qui existent entre deux invariants d’entrelacs. D’une part l’invariant d’Alexander ∆ qui est l’invariant de nœuds le plus classique, et le plus étudié avec le polynôme de Jones, et d’autre part la famille des invariants de Links-Gould LGn,m qui sont des invariants quantiques dérivés des super algèbres de Hopf Uqgl(n|m). On démontre en particulier un cas de la conjecture de De Wit-Ishii-Links : certaines spécialisa- tions des polynômes de Links-Gould fournissent des puissances du polynôme d’Alexander. Les polynômes LG sont donc des généralisations du polynôme d’Alexander. On conjecture de plus que ces invariants conservent certaines propriétés homologiques bien connues de ∆ permettant d’évaluer le genre des entrelacs et de tester le caractère fibré des nœuds. / In this thesis we focus on the connections that exist between two link invariants: first the Alexander-Conway invariant ∆ that was the first polynomial link invariant to be discovered, and one of the most thoroughly studied since alongside with the Jones polynomial, and on the other hand the family of Links-Gould invariants LGn,m that are quantum link invariants derived from super Hopf algebras Uqgl(n|m). We prove a case of the De Wit-Ishii-Links conjecture: in some cases we can recover powers of the Alexander polynomial as evaluations of the Links-Gould invariants. So the LG polynomials are generalizations of the Alexander invariant. Moreover we give evidence that these invariants should still have some of the most remarkable properties of the Alexander polynomial: they seem to offer a lower bound for the genus of links and a criterion for fiberedness of knots.
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