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Search results for: Lie group

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Search results for: Lie group

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Search results for: Lie group

  • Database of the estimations of the numbers of simplices of triangulation of some classical Lie groups

    Open Research Data
    open access
    • X. Zhao
    • W. Marzantowicz
    • G. Graff
    • H. Duan

    It is know that any smooth manifold can be triangulated. The number of simplices of triangulation of a given manifold depends on its topological and combinatorial structure. The data consists of the lower bounds for the numbers of simplices of each dimension of any triangulation of classical Lie groups U(n), SU(n), Sp(n), and SO(n) for n up to 25. Each...

  • The Chow Ring of flag manifolds

    Open Research Data
    open access

    Schubert calculus is the intersection theory of 19th century. Justifying this calculus is the content of the 15th problem of Hilbert. In the course to establish the foundation of algebraic geometry, Van der Vaerden and A. Weil attributed the problem to the determination of the chow ring of flag manifolds G/P, where G is a compact Lie group and P is...

  • A Hopf type theorem for equivariant local maps

    Publication

    We study otopy classes of equivariant local maps and prove a Hopf type theorem for such maps in the case of a real finite-dimensional orthogonal representation of a compact Lie group.

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  • General solution of quantum mechanical equations of motion with time-dependent Hamiltonians: A Lie algebraic approach

    Publication

    - REPORTS ON MATHEMATICAL PHYSICS - Year 2010

    The unitary operators U(t), describing the quantum time evolution of systems with a time-dependent Hamiltonian, can be constructed in an explicit manner using the method of time-dependent invariants. We clarify the role of Lie-algebraic techniques in this context and elaborate the theory for SU(2) and SU(1,1). In these cases we give explicit formulae for obtaining general solutions from special ones. We show that the constructions...

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  • Equivariant Morse equation

    The paper is concerned with the Morse equation for flows in a representation of a compact Lie group. As a consequence of this equation we give a relationship between the equivariant Conley index of an isolated invariant set of the flow given by x˙ = − ∇f(x) and the gradient equivariant degree of ∇f. Some multiplicity results are also presented.

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