Sahamie, Bijan (2009). Dehn Twists and Heegaard Floer Homology. PhD thesis, Universität zu Köln.


Download (1MB)


We derive a representation of the hatversion of Heegaard Floer homology in case we change the associated Heegaard diagram with a Dehn twist. Result of this description is a new exact sequence in the hat-version of Heegaard Floer homology. To give the involved modules a suitable geometric interpretation, we generalize the knot Floer homology HFK to homologically non-trivial knots and relax the admissibility conditions used in their definition. As part of the exact sequence we obtain a map, which we show not to depend on the choices made in its definition, but on the cobordism induced by the Dehn twist. With this map we derive a naturality property between the invariant of Legendrian knots \loss and the contact element and give three applications. Finally, we investigate the relationship between the newly defined exact sequences and the well-known surgery exact triangle in knot Floer homology. With a suitable modification of the construction process of the surgery exact triangle we derive a strong relationship to the newly defined exact sequences. This, finally, results in a relationship between counting holomorphic triangles in doubly-pointed Heegaard triple diagrams and counting holomorphic discs in pointed Heegaard diagrams.

Item Type: Thesis (PhD thesis)
Translated title:
Dehn Twists und Heegaard Floer HomologieGerman
CreatorsEmailORCIDORCID Put Code
Sahamie, Bijansahamie@daad-alumni.deUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-30344
Date: 2009
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Mathematics and Computer Science > Mathematical Institute
Subjects: Mathematics
Uncontrolled Keywords:
Kontaktgeometrie , Heegaar FloerGerman
contact topology , contact geometry , heegaard floerEnglish
Date of oral exam: 15 October 2009
NameAcademic Title
Geiges, HansjörgProf. Dr.
Refereed: Yes


Downloads per month over past year


Actions (login required)

View Item View Item