Sökning: "Poincaré"

Visar resultat 1 - 5 av 28 avhandlingar innehållade ordet Poincaré.

  1. 1. Explanation and deduction : a defence of deductive chauvinism

    Författare :Henrik Hållsten; Matti Sintonen; Stockholms universitet; []
    Nyckelord :HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; Deductive explanation; Statistical explanation; Chances; Propensities; Probabilities; Sine qua non; Probabilistic causality; Indeterminism; Ideal explanatory text; Explanatory information; Explanatory sketches; Dynamic systems; Chaotic systems; Approximate solutions; Argument generating procedure. Central figures: Hempel; Coffa; Salmon; Railton; Humphreys; Kitcher; Poincaré; Suppes; Lorenz; Hénon.; Theoretical Philosophy; teoretisk filosofi;

    Sammanfattning : In this essay I defend the notion of deductive explanation mainly against two types of putative counterexamples: those found in genuinely indeterministic systems and those found in complex dynamic systems. Using Railton's notions of explanatory information and ideal explanatory text, deductivism is defended in an indeterministic setting. LÄS MER

  2. 2. Some Extensions of Poincaré-Bendixson Theory Applied to a Resonant Converter

    Författare :Jan Melin; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Datalogi; numerisk analys; system; kontroll; numerical analysis; systems; control; Naturvetenskap; Computer science; Natural science; Poincaré-Bendixson Theory; Limit Cycles; Resonant Converter; Distributions; Piecewise Linear Systems;

    Sammanfattning : In this thesis existence and uniqueness of limit cycles are shown for a resonant converter, by extending Poincaré-Bendixson theory to non-smooth vector fields. We discuss relevant control theory and the role of simulations... LÄS MER

  3. 3. Poincaré series and homotopy Lie algebras of monomial rings

    Författare :Alexander Berglund; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Algebra and geometry; Algebra och geometri;

    Sammanfattning : .... LÄS MER

  4. 4. Sobolev-Type Spaces : Properties of Newtonian Functions Based on Quasi-Banach Function Lattices in Metric Spaces

    Författare :Lukáš Malý; Anders Björn; Jana Björn; Tomas Sjödin; Andrea Cianchi; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Newtonian space; Sobolev-type space; metric measure space; upper gradient; Sobolev capacity; Banach function lattice; quasi-normed space; rearrangement-invariant space; maximal operator; Lipschitz function; regularization; weak boundedness; density of Lipschitz functions; quasi-continuity; continuity; doubling measure; Poincaré inequality;

    Sammanfattning : This thesis consists of four papers and focuses on function spaces related to first-order analysis in abstract metric measure spaces. The classical (i.e., Sobolev) theory in Euclidean spaces makes use of summability of distributional gradients, whose definition depends on the linear structure of Rn. LÄS MER

  5. 5. Enumerative combinatorics related to partition shapes

    Författare :Jonas Sjöstrand; Anders Björner; Christian Krattenthaler; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; partition shape; sign-imbalance; Robinson-Schensted correspondence; chess tableau; restricted word; cylindrical lattice walk; Poincaré polynomial; Bruhat interval; rook polynomial; pattern avoidance; partitionsform; teckenobalans; Robinson-Schensted-korrespondens; schacktablå; begränsade ord; cylindriska latticestigar; poincarépolynom; bruhatintervall; tornpolynom; mönsterundvikande permutation; MATHEMATICS; MATEMATIK;

    Sammanfattning : This thesis deals with enumerative combinatorics applied to three different objects related to partition shapes, namely tableaux, restricted words, and Bruhat intervals. The main scientific contributions are the following. LÄS MER