title: Iterative Connections and Abhyankar's Conjecture creator: Röscheisen, Andreas subject: ddc-510 subject: 510 Mathematics description: This thesis contains two major parts. In the first part, I introduce a new theory of modules with iterative connection. This theory unifies the theory of modules with connection in characteristic zero as given by N. Katz and the theory of iterative differential modules in positive characteristic as given by B. H. Matzat und M. van der Put. The second part of this work is about the differential Abhyankar conjecture for iterative Picard-Vessiot extensions (IPV-extensions). This conjecture is concerned with the problem which linear algebraic groups occur as iterative differential Galois groups of IPV-extensions with restricted singular locus. In this thesis, I prove the differential Abhyankar conjecture for connected groups and give necessary and sufficient conditions for connected groups for being realisable with given singular points. date: 2006 type: Dissertation type: info:eu-repo/semantics/doctoralThesis type: NonPeerReviewed format: application/pdf identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/7179/1/diss.pdf identifier: DOI:10.11588/heidok.00007179 identifier: urn:nbn:de:bsz:16-opus-71796 identifier: Röscheisen, Andreas (2006) Iterative Connections and Abhyankar's Conjecture. [Dissertation] relation: https://archiv.ub.uni-heidelberg.de/volltextserver/7179/ rights: info:eu-repo/semantics/openAccess rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html language: eng