Artículos: Envíos recientes
Mostrando recursos 181-200 de 523
-
Persistencia del razonamiento equívoco en álgerba. Una interpretación de su génesis escolar
Se analiza la persistencia de raciocinios equívocos vinculados a dificultades y errores algebraicos correlacionados con lógicas procedimentales relativas a la linealidad, extrapolación de propiedades, generalización, entre ... -
Body gestures recognition system to control a service robot
Personal service robots will be in the short future part ofour world by assisting humans in their daily chores. A highly efficient way of communication withpeople is through basic gestures. In this work, we ... -
Null hypersurfaces in generalized Robertson-Walker spacetimes
We study the geometry of null hypersurfaces M in generalized Robertson–Walker spacetimes. First we characterize such null hypersurfaces as graphs of generalized eikonal functions over the fiber and use this characterization ... -
-
Self-Invertible Cubic (Quartic) Permutation Polynomials over Z_p^n with p greater than 7 (p greater than 17) a Prime and Gr öbner Bases
Necessary and sufficient conditions for cubic (quartic) permutation polynomials to be self-invertible over the ring Zpn where p >7 (p >17) is a prime number are given, and completely determined. The characterization of ... -
-
-
-
Una prueba sencilla del teorema de los ceros de Hilbert usando bases de Gröbner
Se presenta una demostración sencilla del teorema de los ceros de Hilbert usando las bases de Grobner para polinomios sobre dominios de ideales principales. -
-
On centrally generically tame algebras over perfect fields
We show that the central generic tameness of a finite-dimensional algebra Λover a (possibly finite) perfect field, is equivalent to its non-almost sharp wildness. In this case: we give, for each natural number d, ... -
-
-
-
On the connection between the representation type of an algebra and its lattice of preradicals
In this paper, we study lattices of preradicals which are not small classes (in which case we say that the corresponding rings are p-large), and specially we consider some infinite representation type algebras. We construct ... -
Global dynamics of a periodic SEIRS model with general incidence rate
We consider a family of periodic SEIRS epidemic models with a fairly general incidence rate of the form Sf(I), and it is shown that the basic reproduction number determines the global dynamics of the models and it is a ... -
-
-
Funtores sharp y un ejercicio sobre endolongitud
Recordamos el concepto de funtor sharp y mostramos una conexión con un ejercicio acerca del tema de endolongitud. -