Advanced search

Showing result 1 - 5 of 22 swedish dissertations matching the above criteria.

  2. 1. Tensor Products of Highest Weight Representations and Skew-Symmetric Matrix Equations A+B+C=0

    Author : Ida Säfström; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Highest weight respresentation; tensor product decomposition; orthogonal algebra; skew-symmetric matrix; Horn’s conjecture; moment map; coadjoint orbit; flag manifold; general linear algebra; infinite dimensional unitary representation; general linear algebra;

    Abstract : The question of characterizing the eigenvalues for the sum of two Hermitian matrices, was solved in 1999, after almost a century of efforts. The saturation conjecture for GL_C(n) was proven by Knutson and Tao, filling in the last gap in Horn’s conjecture. READ MORE

  4. 2. Disconjugate linear ordinary differential equations, flag varieties and classification of symplectic leaves in several Kac-Moody and Gelfand-Dikii algebras

    Author : Boris Shapiro; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Algebra;

    Abstract : .... READ MORE

  5. 3. Tautological rings of Shimura varieties

    Author : Simon Cooper; Wushi Goldring; Torsten Wedhorn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Shimura varieties; Chow rings; automorphic vector bundles; matematik; Mathematics;

    Abstract : This licentiate thesis consists of two papers. In paper I the tautological ring of a Hilbert modular variety at an unramified prime is computed. The method of van der Geer in the case of A_{g} is extended to deal with the case of the Hilbert modular variety, which is more complicated. READ MORE

  6. 4. Fishing for Females : Sensory Exploitation in the Swordtail Characin

    Author : Mirjam Amcoff; Niclas Kolm; Michael Ryan; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Sexual selection; Mate choice; Courtship; Sensory bias; Plasticity; Corynopoma riisei; Mulitiple signalling; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Abstract : Mate choice plays an important role in sexual selection and speciation. The evolution of mate choice is intriguing in cases where choosy individuals gain little except for genetic material from the mate and where the trait used as a criterion for the choice is costly to its bearer. READ MORE

  7. 5. Connectivity and embeddability of buildings and manifolds

    Author : Kathrin Vorwerk; Anders Björner; Christos Athanasiadis; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The results presented in is thesis concern combinatorial and topological properties of objects closely related to geometry, but regarded in combinatorial terms. Papers A and C have in common that they are intended to study properties of buildings, whereas Papers A and B both are concerned with the connectivity of graphs of simplicial complexes. READ MORE