Revistas académicas de la Universidad Católica del Norte
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Regular conditional probability, disintegration of probability and Radon spaces
No full textWe establish equivalence of several regular conditional probability properties and Radon space. In addition, we introduce the universally measurable disintegration concept and prove an existence result
The minimal prime ideal of a valuation ring
No full textIn this paper we consider a non-archimedean ordered field (K, ?) and a valuation v of K compatible with respect to ?. We will give a relation between the existence of a minimal prime ideal of the valuation ring Av and the rank of the valuation
Regularity of solutions of partial neutral functional differential equations with unbounded delay
No full textWe prove the existence of regular solutions for a class of quasi-linear partial neutral functional differential equations with unbounded delay that can be described as the abstract retarded functional differential equation(x(t) + F (t,x?)) = Ax(t)+G(t,x?), where A is the infinitesimal generator of a strongly continuous semigroup of bounded linear operators on a Banach space X and F , G are appropriated functions
The period function in a class of quadratic Kolmogoroff systems
No full textIn this paper we consider the family of quadratic Kolmogoroff systems with a center in the real quadrant:where 1 < a < ?:This system has three invariant lines (the coordinate axes and the line x + y - 1 = 0) and a family of periodic solutions nested around a center and filling out the triangle determined by the three invariant lines. Using integrability of this system we reduce the abelian integral representing the period function and its derivative. The main result is that the corresponding period function is monotone increasing for values of the parameter near a = 3
The total detour monophonic number of a graph
No full textFor a connected graph G = (V, E) of order at least two, a chord of a path P is an edge joining two non-adjacent vertices of P. A path P is called a monophonic path if it is a chordless path. A longest x – y monophonic path is called an x – y detour monophonic path. A set S of vertices of G is a detour monophonic set of G if each vertex v of G lies on an x - y detour monophonic path for some x and y in S. The minimum cardinality of a detour monophonic set of G is the detour monophonic number of G and is denoted by dm(G). A total detour monophonic set of a graph G is a detour monophonic set S such that the subgraph induced by S has no isolated vertices. The minimum cardinality of a total detour monophonic set of G is the total detour monophonic number of G and is denoted by dmt(G). A total detour monophonic set of cardinality dmt(G) is called a dmt-set of G. We determine bounds for it and characterize graphs which realize the lower bound. It is shown that for positive integers r, d and k ≥ 6 with r < d there exists a connected graph G with monophonic radius r, monophonic diameter d and dmt(G) = k. For positive integers a, b such that 4 ≤ a ≤ b with b ≤ 2a, there exists a connected graph G such that dm(G) = a and dmt(G) = b. Also, if p, d and k are positive integers such that 2 ≤ d ≤ p - 2, 3 ≤ k ≤ p and p – d – k + 3 ≥ 0, there exists a connected graph G of order p, monophonic diameter d and dmt(G) = k
Some new classes of vertex-mean graphs
No full textA vertex-mean labeling of a (p, q) graph G = (V, E) is defined as an injective function f : E → {0, 1, 2, ..., q*} , q* = max (p,q) such that the function fV : V → N defined by the rul
¿Qué es "Landscape"?
Get PDFLa palabra inglesa Landscape (que en español significa paisaje), al parecer, está de moda, apareciendo en revistas y congresos de arquitectura. El “paisaje” es entendido como toda extensión que puede ser apreciada desde un sitio, en la mayoría de los casos, considerada un espectáculo tanto natural como urbano; sin embargo, existen otras definiciones, diferentes perspectivas de cómo entender este concepto que suele ser usado ampliamente en diversos medios comunicativos y de expresión. De esta forma, el paisaje puede ser visto como objeto, diseño, arte, hábitat ecológico, elemento de identidad cultural y lugar de relajación, entre otras nociones, las cuales son presentadas brevemente en este artículo
Transición Creativa-Cognitiva en la Vivienda Construida y Habitada por Usuarios
Get PDFUno de los aspectos difíciles de caracterizar en la vivienda habitada y construida por el usuario, lo constituye la aparente cuota de creatividad que la distingue como producción material. El propósito de indagar en los rasgos de este dominio, tiene como objetivo llegar a establecer cuáles son los vínculos entre esta práctica y los aspectos formativos que intervienen en su proceso de producción
Lista de Contenidos
Get PDFLista de Contenidos. Cuadernos de la Facultad / Documentos 1982 · 1989.Lista de Contenidos. Cuadernos de Arquitectura / Habitar el Norte 1989 · 2006.Lista de Contenidos por Autor. Documentos y Cuadernos de Arquitectura 1982 · 200
Taller Historia del tiempo/6
No full textAl preguntar que ciudad queremos, debemos preguntar qué hombre queremos, y fundamentalmente qué hombre queremos ser... Aquí un momento autocreativo y de cambio constante del propio hombre... para ello acudimos a nuestra definición de asentamiento como: un modo de ser en el acto