Search for dissertations about: "bracket"

Showing result 1 - 5 of 13 swedish dissertations containing the word bracket.

  2. 1. BV-algebras in topology and homotopy algebra

    Author : Kaj Börjeson; Alexander Berglund; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematics; matematik;

    Abstract : This Licentiate thesis consists of two papers. The first paper is called A-infinity-algebras derived from associative algebras with a non-derivation differential. The second paper is joint work with A. Berglund and is called Free loop space homology of highly connected manifolds. READ MORE

  4. 2. Studies in growth and household allocation

    Author : Frida Widmalm; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Abstract : This thesis consists of three self-contained essays.Essay 1 Using pooled cross-sectional data from 23 OECD countries, between 1965 and 1990, I find evidence that the tax structure affects economic growth. Specifically, the proportion of tax revenue raised by taxing personal income has a negative correlation with economic growth. READ MORE

  5. 3. Free loop spaces, Koszul duality and A-infinity algebras

    Author : Kaj Börjeson; Alexander Berglund; Pascal Lambrechts; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Koszul duality; free loop spaces; a-infinity algebras; BV-algebras; string topology; Mathematics; matematik;

    Abstract : This thesis consists of four papers on the topics of free loop spaces, Koszul duality and A∞-algebras. In Paper I we consider a definition of differential operators for noncommutative algebras. This definition is inspired by the connections between differential operators of commutative algebras, L∞-algebras and BV-algebras. READ MORE

  6. 4. Dynamic modelling and analysis of vertical machines

    Author : Erik Synnegård; Matti Rantatalo; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Abstract : Since Sweden’s hydropower plants are getting old and operating conditions have changed, there is a need for simulation tools to predict the functionality, durability and needs for maintenance. Also for breakdowns and major revisions, there is a benefit if dynamical problems could be predicted through simulations. READ MORE

  7. 5. Going Round in Circles : From Sigma Models to Vertex Algebras and Back

    Author : Joel Ekstrand; Maxim Zabzine; Anton Alekseev; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chiral de Rham complex; Conformal field theory; Poisson vertex algebra; Sigma model; String theory; Vertex algebra; Theoretical Physics; Teoretisk fysik;

    Abstract : In this thesis, we investigate sigma models and algebraic structures emerging from a Hamiltonian description of their dynamics, both in a classical and in a quantum setup. More specifically, we derive the phase space structures together with the Hamiltonians for the bosonic two-dimensional non-linear sigma model, and also for the N=1 and N=2 supersymmetric models. READ MORE