Sökning: "blowup"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet blowup.

  1. 1. Numerical analysis and simulation of stochastic partial differential equations with white noise dispersion

    Författare :André Berg; David Cohen; Per Åhag; Guillaume Dujardin; Ludovic Goudenège; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stochastic partial differential equation; mathematics; numerical analysis; numerical scheme; time integrator; convergence analysis; blowup; critical exponent; nonlinear Schrödinger equation; Manakov equation; Benjamin-Bona-Mahony equation; BBM equation; stochastic; random; dispersion; white noise dispersion; finite difference; pseudospectral; code; matlab; exponential integrator; splitting integrator; convergence in probability; Mathematics; matematik; Numerical Analysis; numerisk analys;

    Sammanfattning : This doctoral thesis provides a comprehensive numerical analysis and exploration of several stochastic partial differential equations (SPDEs). More specifically, this thesis investigates time integrators for SPDEs with white noise dispersion. LÄS MER

  3. 2. A descent principle for compact support extensions of functors

    Författare :Josefien Kuijper; Dan Petersen; Tom Bachmann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matematik; Mathematics;

    Sammanfattning : This licentiate thesis consists of one paper about cohomology theories of algebraic varieties. Certain cohomology theories, such as singular cohomology of topological spaces, and sheaf cohomology, have a variant that we call “compactly supported cohomology”. LÄS MER

  4. 3. Synchronization and consistency in concurrent systems

    Författare :Anders Gidenstam; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; event ordering; lock-free; memory management; time-stamping system; plausible clocks; non-blocking; logical clocks; synchronization;

    Sammanfattning : This thesis investigates aspects of synchronization and coordination in concurrent systems. In such systems synchronization and coordination are highly important as they form a basis for how a set of entities can collaborate to solve a task. LÄS MER

  5. 4. Ga-actions on Complex Affine Threefolds

    Författare :Isac Hedén; Heinz Fieseler; Lucy Moser-Jauslin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Complex affine varieties; algebraic group actions of C^ and C^*; locally nilpotent derivations; graded algebras; principal bundles; Russell s hypersurface;

    Sammanfattning : This  thesis  consists  of two papers  and  a summary.  The  papers  both  deal with  affine algebraic complex  varieties,  and  in particular such  varieties  in dimension  three  that have a non-trivial action  of one of the  one-dimensional  algebraic  groups  Ga   :=  (C, +) and  Gm  :=  (C*, ·). LÄS MER

  7. 5. Moduli spaces of zero-dimensional geometric objects

    Författare :Christian Lundkvist; Dan Laksov; Jason Starr; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Algebraic geometry; Commutative algebra; Moduli spaces; Algebra and geometry; Algebra och geometri;

    Sammanfattning : The topic of this thesis is the study of moduli spaces of zero-dimensional geometricobjects. The thesis consists of three articles each focusing on a particular moduli space.The first article concerns the Hilbert scheme Hilb(X). This moduli space parametrizesclosed subschemes of a fixed ambient scheme X. LÄS MER