Search results for " Idea"
showing 10 items of 261 documents
Factorization of homomorphisms through H∞(D)
2003
AbstractWeakly compact homomorphisms between (URM) algebras with connected maximal ideal space are shown to factor through H∞(D) by means of composition operators and to be strongly nuclear. The spectrum of such homomorphisms is also described. Strongly nuclear composition operators between algebras of bounded analytic functions are characterized. The path connected components of the space of endomorphisms on H∞(D) in the uniform operator topology are determined.
Irreducible components of Hurwitz spaces parameterizing Galois coverings of curves of positive genus
2014
Let Y be a smooth, projective, irreducible complex curve. A G-covering p : C → Y is a Galois covering, where C is a smooth, projective, irreducible curve and an isomorphism G ∼ −→ Aut(C/Y ) is fixed. Two G-coverings are equivalent if there is a G-equivariant isomorphism between them. We are concerned with the Hurwitz spaces H n (Y ) and H G n (Y, y0). The first one parameterizes Gequivalence classes of G-coverings of Y branched in n points. The second one, given a point y0 ∈ Y , parameterizes G-equivalence classes of pairs [p : C → Y, z0], where p : C → Y is a G-covering unramified at y0 and z0 ∈ p (y0). When G = Sd one can equivalently consider coverings f : X → Y of degree d with full mon…
Examples of proper k-ball contractive retractions in F-normed spaces
2007
Abstract Assume X is an infinite dimensional F -normed space and let r be a positive number such that the closed ball B r ( X ) of radius r is properly contained in X . The main aim of this paper is to give examples of regular F -normed ideal spaces in which there is a 1-ball or a ( 1 + e ) -ball contractive retraction of B r ( X ) onto its boundary with positive lower Hausdorff measure of noncompactness. The examples are based on the abstract results of the paper, obtained under suitable hypotheses on X .
Lipschitz operator ideals and the approximation property
2016
[EN] We establish the basics of the theory of Lipschitz operator ideals with the aim of recovering several classes of Lipschitz maps related to absolute summability that have been introduced in the literature in the last years. As an application we extend the notion and main results on the approximation property for Banach spaces to the case of metric spaces. (C) 2015 Elsevier Inc. All rights reserved.
Radical Rings with Engel Conditions
2000
Abstract An associative ring R without unity is called radical if it coincides with its Jacobson radical, which means that the set of all elements of R forms a group denoted by R ∘ under the circle operation r ∘ s = r + s + rs on R . It is proved that, for a radical ring R , the group R ∘ satisfies an n -Engel condition for some positive integer n if and only if R is m -Engel as a Lie ring for some positive integer m depending only on n .
On i-topological spaces: generalization of the concept of a topological space via ideals
2006
[EN] The aim of this paper is to generalize the structure of a topological space, preserving its certain topological properties. The main idea is to consider the union and intersection of sets modulo “small” sets which are defined via ideals. Developing the concept of an i-topological space and studying structures with compatible ideals, we are concerned to clarify the necessary and sufficient conditions for a new space to be homeomorphic, in some certain sense, to a topological space.
Reliģiski-filozofiski raksti, Speciālizlaidums I
2022
A special issue, “Remembering the Past and the Future - Korean Culture in a Changing World,” is devoted to understanding Korean culture. Regardless of the bulk of comprehensive information available today, accurate knowledge of the Asian culture in Europe or the European culture in Asia has not become considerably deeper. Sometimes even to the contrary – the old stereotypes continue to exist as part of the packaging for pseudo information adjusted to the short-term goals of the contemporary globalised society, supplemented by travel guides and announcements tailored to the needs of immediate politically economic conjuncture. And yet, this is only the top of the intercultural communication i…
Municipalities’ Decision to Care: At Home or in a Nursing Home
2020
AbstractAn almost ideal demand system for long-term care is estimated using data from Norway, where the split of long-term care between home care and care in nursing homes is determined by municipalities. Previous literature has barely addressed what determines municipalities’ or other organizations’ allocations of resources to the sub-sectors of long-term care. The results show that home care is a luxury, while nursing home care is a necessity with respect to total expenditures on long-term care. Municipalities respond to high unit costs for home care by reducing that type of care. Municipalities are highly responsive to variations in the need for the two types of care and seem to provide …
La indumentaria como fuente para la didáctica de la historia: problemática y estado de la cuestión
2010
La indumentaria es un objeto de incuestionable valor para la didáctica de la historia y de otras ciencias sociales, ya que posee todas las cualidades de la didáctica del objeto con un atractivo añadido muy vinculado a su aspecto y funcionalidad estética y a su reclamo visual; es fácil vincular períodos históricos con su indumentaria característica, puesto que nuestro imaginario cultural está lleno de películas, pinturas e incluso disfraces que proporcionan datos al respecto. Lo que resulta complicado es dilucidar qué imágenes son las más fidedignas, y esta cuestión no es otra que la relacionada con la veracidad y rigor de las fuentes de la indumentaria. El presente artículo analiza dicha pr…
When intentions turn into action: pathways to successful firm performance
2021
Entrepreneurship brings wealth to nations and contributes to their economic growth. People can take many paths to become entrepreneurs. Some join the family business, whilst others are born entrepreneurs, letting their innate intuition lead them into firm creation. For many, though, being able to learn and acquire the right skills is critical for a successful career as an entrepreneur. Like other human capital factors, entrepreneurial skills can be acquired. In today’s fast-changing society, it is of utmost importance for entrepreneurs not only to gain these skills but also to be surrounded by a supportive environment that will (1) guide them in the creation of their business idea and (2) h…