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  1. Compact perturbations and norm attaining operators

    Compact perturbations and norm attaining operators

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Janice Kover
    In 1963, Lindenstrauss showed that for a reflexive space, X, and any Banach space,Y, that the norm attaining operators in L(X, Y) are dense. Recall that a linear operator A is norm attaining if there exists a unit vector x...
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  2. Perturbations by norm attaining operators

    Perturbations by norm attaining operators

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Janice Kover
    In this note, we develop a connection between Fredholm operators and norm attaining operators in the set L(H) of bounded linear operators on a Hilbert space. We use this connection to extend an earlier result about the stability of norm...
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  3. Gradual increase in the intensity of machine traffic in timber harvesting: effects on soil composition and functionality

    Gradual increase in the intensity of machine traffic in timber harvesting: effects on soil composition and functionality

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Miriam Fernanda Rodrigues --- , Brazil Diego Rodrigues --- , Brazil André Pellegrini --- , Brazil Elisandra Pocojeski --- , Brazil
    This study describes the effects of gradually increasing the intensity of machine traffic in timber harvesting of Pinus taeda L. in a cut-to-length system on the severity of compaction and changes in functionality of a subtropical Oxisol in southern Brazil...
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  4. Nehari manifold approach for a singular multi-phase variable exponent problem

    Nehari manifold approach for a singular multi-phase variable exponent problem

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mustafa Avci --- Athabasca University, Canada
    This paper is concerned with a singular multi-phase problem with variable singularities. The main tool used is the Nehari manifold approach. Existence of at least two positive solutions with positive-negative energy levels are obtained. For the illustration of the main...
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