Revistas académicas de la Universidad Católica del Norte
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New types of locally connected spaces via clopen set
No full textIn this paper, we define and study a new type of connected spaces called λco-connected space. It is remarkable that the class of λ-connected spaces is a subclass of the class of λco-connected spaces. We discuss some characterizations and properties of λco-connected spaces, λco components and λco-locally connected spaces
On some new paranormed sequence spaces defined by the matrix D (r, 0, 0, s)
No full textIn this paper, we introduce some new paranormed sequence spaces and study some topological properties. Further, we determine α, β and γ-duals of the new sequence spaces and finally, we establish the necessary and sufficient conditions for characterization of matrix mappings
Spectral analysis of Hahn-Dirac system
No full textIn this paper, we study some spectral properties of the one-dimensional Hahn-Dirac boundary-value problem, such as formally self-adjointness, the case that the eigenvalues are real, orthogonality of eigenfunctions, Greens function, the existence of a countable sequence of eigenvalues, eigenfunctions forming an orthonormal basis of L2w,q ((w0. a): E)
Social Innovation Studies, un paso adelante en la construcción del campo de la innovación social
Get PDFTheoretical and bibliometric studies carried out on social innovation (SI) frequently indicate that, despite the prominence that it has been gaining in the strategies of multilateral organizations and in the government structures and public policies of a variety of countries, the field lacks conceptual and investigative clarity. The absence of specialized journals and co-authorship networks has influenced this situation. Internationally, the focus of SI has been guided mainly by Europe and North America, regions where research and scientific publication have been stimulated by the rise of the term in development programs. However, in Latin America, SI has had its own characteristics and deserves a treatment with appropriate conceptual frameworks. Social Innovation Studies (SIS) wants to bring together the atomized Latin American publication on the subject and convene authors from the region to engage in an international dialogue based on an analysis of the regional reality that addresses a wide spectrum, from micro-approaches supported by case analysis to macro-approaches that link SI with great processes of social change.Los estudios teóricos y bibliométricos realizados sobre la innovación social (IS) indican con frecuencia que, pese al protagonismo que ha ganado en las estrategias de organismos multilaterales y en las estructuras gubernamentales y las políticas públicas de una diversidad de países, el campo adolece de claridad conceptual e investigativa. La falta de revistas especializadas y redes de coautoría habrían incidido en esta situación. A nivel internacional, el enfoque de la IS ha sido marcado principalmente por Europa y Norteamérica, regiones en las que la investigación y la publicación científica se han visto estimuladas por el ascenso del término en programas de desarrollo. No obstante, en Latinoamérica, la IS ha tenido sus propias características y merece un tratamiento con marcos conceptuales pertinentes. Social Innovation Studies (SIS) busca reunir la atomizada publicación latinoamericana en la materia y convocar a los autores de la región para entablar un diálogo internacional basado en un análisis de la realidad regional que aborde un amplio espectro, desde enfoques micro sustentados en análisis de casos, hasta enfoques macro que relacionen la IS con los grandes procesos de cambio social
Los desafios de la interaccion social a distancia en los programas dirigidos a la comunidad extranjera
Get PDFEn el contexto de la crisis sanitaria mundial que afectó a Chile a partir de marzo de 2020, los espacios de atención presencial a extranjeros fueron reemplazados por espacios virtuales y medios electrónicos, que transforman la interacción social de los programas dirigidos a la comunidad extranjera y presentan nuevos desafíos en cuanto al uso y acceso a la tecnología, así como el significado de los espacios virtuales
The forcing total monophonic number of a graph
No full textFor a connected graph G = (V, E) of order at least two, a subset T of a minimum total monophonic set S of G is a forcing total monophonic subset for S if S is the unique minimum total monophonic set containing T . A forcing total monophonic subset for S of minimum cardinality is a minimum forcing total monophonic subset of S. The forcing total monophonic number ftm(S) in G is the cardinality of a minimum forcing total monophonic subset of S. The forcing total monophonic number of G is ftm(G) = min{ftm(S)}, where the minimum is taken over all minimum total monophonic sets S in G. We determine bounds for it and find the forcing total monophonic number of certain classes of graphs. It is shown that for every pair a, b of positive integers with 0 ≤ a < b and b ≥ a+4, there exists a connected graph G such that ftm(G) = a and mt(G) = b
Stability of a general p-radical functional equation related to additive mappings in 2-Banach spaces
No full textIn this paper, we introduce and solve a new general p-radical functional equation
Also, we investigate some stability and hyperstability results for the considered equation in 2-Banach spaces. In addition, we prove the hyperstability of the inhomogeneous p-radical functional equatio
The edge-to-edge geodetic domination number of a graph
No full textLet G = (V, E) be a connected graph with at least three vertices. A set S Í E is called an edge-to-edge geodetic dominating set of G if S is both an edge-to-edge geodetic set of G and an edge dominating set of G. The edge-to- edge geodetic domination number ¡gee(G) of G is the minimum cardinality of its edge-to-edge geodetic dominating sets and any edge-to-edge geodetic dominating set of minimum cardinality is said to be a gee- set of G. Some general properties satisfied by this concept are studied. Connected graphs of size m?2 with edge-to-geodetic domination number 2 or m or m-1 are charaterized. We proved that if G is a connected graph of size m ? 3 and G is also connected,then 4 ?¡gee(G) + ¡gee(G) ? 2m -2. Moreover we characterized graphs for which the lower and the upper bounds are sharp. It is shown that, for every pair of positive integers a and b with 2 ?a ? b, there exists a connected graph G with gee(G) = a and ¡gee(G) = b. Also it is shown that, for every pair of positive integers a and b with 2 < a ? b, there exists a connected graph G with ¡e(G) = a and¡ gee(G) = b, where ¡e(G) is the edge domination number of G and gee(G) is the edge-to-edge geodetic number of G
Equitably strong nonsplit equitable domination in graphs
No full textIn a simple, finite and undirected graph G with vertex set V and edge set E, Prof. Sampathkumar defined degree equitability among vertices of G. Two vertices u and v are said to be degree equitable if |deg(u) − deg(v)| ≤ 1. Equitable domination has been defined and studied in [7]. V.R.Kulli and B.Janakiram defined strong non - split domination in a graph [12]. In this paper, the equitable version of this new type of domination is studie
Controllability of impulsive neutral stochastic integro-differential systems driven by fractional Brownian motion with delay and Poisson jumps
No full textIn this paper the controllability of a class of impulsive neutral stochastic integro-differential systems driven by fractional Brownian motion and Poisson process in a separable Hilbert space with infinite delay is studied. The controllability result is obtained by using stochastic analysis and a fixed-point strategy. Finally, an illustrative example is given to demonstrate the effectiveness of the obtained result