Sökning: "automorphisms"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet automorphisms.

  1. 1. Holomorphic automorphisms of Danielewski surfaces

    Författare :Andreas Lind; Frank Kutzschebauch; Egmont Porten; Frank Wikström; Erik Low; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Danielewski surfaces; holomorphic; automorphisms; Lie groups; Algebra; geometry and mathematical analysis; Algebra; geometri och analys;

    Sammanfattning : In this thesis we define the notion of an overshear on a Danielewskisurface. Next we show that the group generated by the overshears is dense in the component of the identity of the automorphism group. LÄS MER

  3. 2. Formality and homotopy automorphisms in rational homotopy theory

    Författare :Bashar Saleh; Alexander Berglund; Marco Manetti; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rational homotopy theory; formality; homotopy automorphisms; Mathematics; matematik;

    Sammanfattning : This licentiate thesis consists of two papers treating subjects in rational homotopy theory.In Paper I, we establish two formality conditions in characteristic zero. We prove that adg Lie algebra is formal if and only if its universal enveloping algebra is formal. LÄS MER

  4. 3. On the automorphism group of Danielewski surfaces

    Författare :Andreas Lind; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Automorphisms; Danielewski surfaces; Overshears; MATHEMATICS; MATEMATIK;

    Sammanfattning : In this thesis we define the notion of an overshear on a Danielewski surface. We show that the group generated by the overshears is dense (in the compact open topology) in the automorphism group for small degrees of the defining polynomial. It is also shown in the thesis that the overshear group has a structure of an amalgamated product. LÄS MER

  5. 4. Symmetry in Randomness : Additive Functionals and Symmetries of Random Trees and Tree-Like Graphs

    Författare :Christoffer Olsson; Stephan Wagner; Ralph Neininger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Random trees; Random graphs; Additive functionals; Automorphisms; Mathematics; Matematik;

    Sammanfattning : Properties of symmetries in random trees and tree-like graphs are explored. The primary structures studied are Galton-Watson trees, unlabeled unordered trees as well as labeled subcritical graphs. LÄS MER

  7. 5. Formality and rational homotopy theory of relative homotopy automorphisms

    Författare :Bashar Saleh; Alexander Berglund; Aniceto Murillo; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; rational homotopy theory; formality; relative homotopy automorphisms; Mathematics; matematik;

    Sammanfattning : This PhD thesis consists of four papers treating topics in rational homotopy theory.In Paper I, we establish two formality conditions in characteristic zero. We prove that a dg Lie algebra is formal if and only if its universal enveloping algebra is formal. LÄS MER