Revistas académicas de la Universidad Católica del Norte
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Banach lattices with properties of dunford- pettis type
No full textThis paper is devoted to relationships between weakly compact operators and M- weakly compact (L-weakly compact) operators acting from (resp. into) Banach lattices. We define the M - Dunford - Pettis Property for Banach lattices and the L-Dunford-Pettis Property in Banach spaces. The paper contains some characterizations of this two properties
On some questions of the weak solutions of evolution equations for magnetohydrodynamic type
No full textWe prove that the weak solution of the equations for magneto-hydrodynamic type posses fractional derivatives in time of any order less that 1/2 if n = 2 and that it is true conditionally in the three and four-dimensional cases. Also, we give some results of uniqueness of weak solutions similar to the Navier-Stokes equations for n > 3. Thus, we reach the same level of knoweledge as the one in the case of the classical Navier-Stokes
Champs de vecteurs holomorphes tangents aux hypersurfaces polynômiales rigides de ? 2
No full textIn this paper, we present two works. The .first give a complet description of tangent holomorphic vector fields of rigid polynomial hypersurfaces in C2 which is not spheric at the origine.In the second we studie the propre holomorphic mappings between rigid polynomial domains ?1, ?2 in C 2, more precisely we prove that, if b?1 is strictely pseudo-convexe and not spheric in at less one point, then such map is of the form (?? + f1 (z), f2(z)), where ? ? R* and f1, f2 are two polynômes
David Hilbert
No full textMatemático alemán, se le considera como uno de los fundadores de la matemática moderna por su contribución al desarrollo de todas las ramas de la matemática; desde el álgebra a la geometría y desde el análisis a la física matemática
Classical and Quantum Semigroups
No full textSeveral quantum Markov semigroups admit an invariant abelian subalgebra which can be looked at as an algebra of bounded functions on some measurable space. The restriction to this subalgebra is a semigroup of positive and identity preserving operators i.e. a classical Markov semigroup (see Examples 3.3, 3.4)
The t-pebbling number of Lamp graphs
No full textLet G be a graph and some pebbles are distributed on its vertices. A pebbling move (step) consists of removing two pebbles from one vertex, throwing one pebble away, and moving the other pebble to an adjacent vertex. The t-pebbling number of a graph G is the least integer m such that from any distribution of m pebbles on the vertices of G, we can move t pebbles to any specified vertex by a sequence of pebbling moves.
In this paper, we determine the t-pebbling number of Lamp graphs
Generalized centroid of Γ-semirings
No full textWe define and study the generalized centroid of a semiprime Γ-semiring. We show that the generalized centroid CΓ is a multiplicatively reguler Γ-semiring and so Γ-semifield and give some properties of the generalized centroid of a semiprime Γ-semiring
Actividades del Departamento
No full textPor decreto 343/81 de Julio del año 1981 se oficializaron las carreras nuevas que ofrece la Universidad del Norte a partir del presente año. En dicho decreto, se crea entre otras la carrera de “Licenciatura en Matemáticas”, otorgando el grado de Licenciado y los títulos de Matemático o Profesor de Matemática