Articles by Author: Luis M P Cer Aco

Search results for Luis M P Cer Aco

We found 15 results for you
  1. Noetherian quivers

    Noetherian quivers

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    Noetherian quivers have been studied and characterized (when the number of arrows is finite) by Höinghaus and Richter in [10]. In this paper we give a characterization of noetherian quivers in the most general case in Theorem 3.6. We prove...
  2. (<em>p,</em>
               <em>q</em>)-Summing Sequences of Operators

    (<em>p,</em> <em>q</em>)-Summing Sequences of Operators

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A sequence (u j)j∈N of operators inL (X, Y) is a (p, q)-summing multiplier (or (p, q)-summing sequence of operators), in short (u j) ∈l πp, q (X, Y), if there exists a constant C > 0 such that, for...
  3. <em>L</em>
               <sup>
                  <em>p</em>
               </sup>-valued Measures Without Finite <em>X</em>-semivariation for 2 &lt; <em>p</em> &lt; ∞

    <em>L</em> <sup> <em>p</em> </sup>-valued Measures Without Finite <em>X</em>-semivariation for 2 &lt; <em>p</em> &lt; ∞

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We show that for 1 ≤ p < ∞, the property that every L p -valued vector measure has finite X-semivariation in L p (μ, X) is equivalent to the property that every continuous linear map from l...
  4. DNA sequences from the Little Brown Bustard <em>Eupodotis humilis</em> suggest its close phylogenetic relationship to the Little Bustard <em>Tetrax tetrax</em>

    DNA sequences from the Little Brown Bustard <em>Eupodotis humilis</em> suggest its close phylogenetic relationship to the Little Bustard <em>Tetrax tetrax</em>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Taxonomic classification of birds based exclusively on morphology and plumage traits has often been found to be inconsistent with true evolutionary history when tested with molecular phylogenies based on neutrally evolving markers. Here we present cytochrome-b gene sequences for the...
  5. <em>Felicitas Publica</em> and community well-being: nourishing relational goods through dialogic conversations between deprived and privileged populations

    <em>Felicitas Publica</em> and community well-being: nourishing relational goods through dialogic conversations between deprived and privileged populations

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This article discusses the theoretical justifications, presumed relevance and value of using community interventions designed to be appreciative and strengths based, participatory and conversational, context sensitive and value driven, to promote well-being actions and coordinated meaning between privileged persons and...
  6. The dynamics of local innovations among formal and informal enterprises: Stories from rural South Africa

    The dynamics of local innovations among formal and informal enterprises: Stories from rural South Africa

    Exploiting the developmental potential of innovation for marginalised communities requires a context-specific understanding of the features and mechanics of innovation. In this article we explore the nature of innovation with the aid of evidence collected from formal and informal enterprises...
  7. Predictors of quality of life enjoyment and satisfaction in individuals living with HIV and AIDS in a resource-constrained setting in South Africa

    Predictors of quality of life enjoyment and satisfaction in individuals living with HIV and AIDS in a resource-constrained setting in South Africa

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The burden of HIV disease is concentrated in sub-Saharan Africa, particularly in South Africa (SA). Whilst there have been many studies conducted on the biomedical and socio-psychological aspects of HIV and AIDS, insufficient attention has been paid to the quality...
  8. Occurrence and ecological aspects of the two-fingered skink <em>Chalcides mauritanicus</em> in the Chafarinas Islands in North Africa

    Occurrence and ecological aspects of the two-fingered skink <em>Chalcides mauritanicus</em> in the Chafarinas Islands in North Africa

    Item type: Journal Article • Journal: African Journal of Herpetology
    The two-fingered skink, Chalcides mauritanicus, is a fossorial species from North Africa, where it has only been found at a few localities on sandy sea shores. Virtually nothing is known about its ecology. For the first time, we report the...
  9. One-sided dichotomies versus two-sided dichotomies: arbitrary growth rates

    One-sided dichotomies versus two-sided dichotomies: arbitrary growth rates

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We obtain necessary and sufficient conditions for the existence of two-sided nonuniform exponential dichotomies with arbitrary growth rates in terms of the existence of one-sided nonuniform exponential dichotomies on the past and on the future. We consider both linear nonautonomous...