Topological properties of minimal surfaces
This thesis describes examples which answer two questions posed by Meeks about the topology of minimal surfaces. Question 1 [Meeksl, conjecture 5][Meeks2, Problem l]. Given a set Г of disjoint smooth Jordan curves on the standard 2-sphere S2, such that Г bounds two homeomorphic embedded compact conn...
Main Author: | |
---|---|
Published: |
University of Warwick
1983
|
Subjects: | |
Online Access: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354724 |
id |
ndltd-bl.uk-oai-ethos.bl.uk-354724 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-bl.uk-oai-ethos.bl.uk-3547242019-03-14T03:22:16ZTopological properties of minimal surfacesHall, Peter1983This thesis describes examples which answer two questions posed by Meeks about the topology of minimal surfaces. Question 1 [Meeksl, conjecture 5][Meeks2, Problem l]. Given a set Г of disjoint smooth Jordan curves on the standard 2-sphere S2, such that Г bounds two homeomorphic embedded compact connected minimal surfaces F and G in B³, is there an isotopy of B³ fixing Г and taking F to G? Meeks has shown that such surfaces always split B³ into two handlebodies; it then follows that such an isotopy exists if T consists of a single curve or if F and G are annuli [Meeks2, Theorem 2]. We give two examples where F and G are not isotopic in one example F and G are planar domains with three boundary components and in the other they have genus one and two boundary components. Question 2 [Meeksl, conjecture 2][Nitschel, §910(b)]. Can a Jordan curve on the boundary of a convex set in R³ bound a minimal disc that is not embedded? Meeks and Yau have proved that such a disc is embedded under the assumption that it solves the problem of least area for its boundary [MYI, Theorem 2j. We give an example that shows this assumption is necessary. Our examples can be described informally using the "bridge principle," a heuristic method for constructing minimal surfaces which was introduced by Courant [Courant, Lemma 3.3] and Levy [Livy, Chapter I, Section 6]. A method for making such examples rigorous was given by Meeks and Yau [MY2, Theorem 7], and we include an exposition of the results of theirs that we need.510QA MathematicsUniversity of Warwickhttps://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354724http://wrap.warwick.ac.uk/114392/Electronic Thesis or Dissertation |
collection |
NDLTD |
sources |
NDLTD |
topic |
510 QA Mathematics |
spellingShingle |
510 QA Mathematics Hall, Peter Topological properties of minimal surfaces |
description |
This thesis describes examples which answer two questions posed by Meeks about the topology of minimal surfaces. Question 1 [Meeksl, conjecture 5][Meeks2, Problem l]. Given a set Г of disjoint smooth Jordan curves on the standard 2-sphere S2, such that Г bounds two homeomorphic embedded compact connected minimal surfaces F and G in B³, is there an isotopy of B³ fixing Г and taking F to G? Meeks has shown that such surfaces always split B³ into two handlebodies; it then follows that such an isotopy exists if T consists of a single curve or if F and G are annuli [Meeks2, Theorem 2]. We give two examples where F and G are not isotopic in one example F and G are planar domains with three boundary components and in the other they have genus one and two boundary components. Question 2 [Meeksl, conjecture 2][Nitschel, §910(b)]. Can a Jordan curve on the boundary of a convex set in R³ bound a minimal disc that is not embedded? Meeks and Yau have proved that such a disc is embedded under the assumption that it solves the problem of least area for its boundary [MYI, Theorem 2j. We give an example that shows this assumption is necessary. Our examples can be described informally using the "bridge principle," a heuristic method for constructing minimal surfaces which was introduced by Courant [Courant, Lemma 3.3] and Levy [Livy, Chapter I, Section 6]. A method for making such examples rigorous was given by Meeks and Yau [MY2, Theorem 7], and we include an exposition of the results of theirs that we need. |
author |
Hall, Peter |
author_facet |
Hall, Peter |
author_sort |
Hall, Peter |
title |
Topological properties of minimal surfaces |
title_short |
Topological properties of minimal surfaces |
title_full |
Topological properties of minimal surfaces |
title_fullStr |
Topological properties of minimal surfaces |
title_full_unstemmed |
Topological properties of minimal surfaces |
title_sort |
topological properties of minimal surfaces |
publisher |
University of Warwick |
publishDate |
1983 |
url |
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354724 |
work_keys_str_mv |
AT hallpeter topologicalpropertiesofminimalsurfaces |
_version_ |
1719001761102954496 |