Sökning: "morphism"

Visar resultat 1 - 5 av 21 avhandlingar innehållade ordet morphism.

1. 1. Symbolic sequences, crucial words and iterations of a morphism

   Författare :Sergey Kitaev; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; symbolic sequence; combinatorics on words; morphism; iteration of a morphism; set of prohibitions; complete set of prohibitions; crucial word; Arshon sequence; sequence of sigma; set of prohibitions;

   Sammanfattning : .... LÄS MER

3. 2. Cyclic Trigonal Riemann Surfaces of Genus 4

   Författare :Daniel Ying; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Riemann surface; trigonal morphism; Accola; genus 4; MATHEMATICS; MATEMATIK;

   Sammanfattning : A closed Riemann surface which can be realized as a 3-sheeted covering of the Riemann sphere is called trigonal, and such a covering is called a trigonal morphism. Accola showed that the trigonal morphism is unique for Riemann surfaces of genus g ≥ 5. This thesis will characterize the Riemann surfaces of genus 4 wiht non-unique trigonal morphism. LÄS MER

4. 3. On the Moduli Space of Cyclic Trigonal Riemann Surfaces of Genus 4

   Författare :Daniel Ying; Milagros Izquierdo; David Singerman; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Riemann surface; Riemann sphere; Trigonal morphism; MATHEMATICS; MATEMATIK;

   Sammanfattning : A closed Riemann surface which can be realized as a 3-sheeted covering of the Riemann sphere is called trigonal, and such a covering is called a trigonal morphism. Accola showed that the trigonal morphism is unique for Riemann surfaces of genus g ≥ 5. LÄS MER

5. 4. Harmonic morphisms, Hermitian structures and symmetric spaces

   Författare :Martin Svensson; Matematik (naturvetenskapliga fakulteten); []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; isotropic subbundles; conformal foliations; holomorphic maps; harmonic morphism;

   Sammanfattning : A harmonic morphism is a map between two Riemannian manifolds with the property that its composition with a local harmonic function on the codomain is a local harmonic function on the domain. Such a map is automatically a harmonic map, satisfying an additional partial conformality condition called horizontal (weak) conformality. LÄS MER

7. 5. Compactified Configuration Space of Points on a Line and Homotopies of A_ infty Morphisms

   Författare :Theo Backman; Sergei Merkulov; Alexander Berglund; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; matematik;

   Sammanfattning : In this thesis we construct a configuration space model for a particular 2-colored dg operad encoding the structure of two A_infty algebras with two A_infty morphism and a homotopy between the morphisms. We determine the cohomology of this operad to be the well-known 2-colored operad encoding the structure of a two associative algebras and an associative algebra morphism between them. LÄS MER