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Os Médicos e a Gestão

Dinâmica do desdobramento de sólidos geométricos com recurso ao GeoGebra 2D

O GeoGebra é um software educacional livre que permite manipular objetos matemáticos do plano, representando-os algébrica e geometricamente. Neste artigo recorremos a conceitos matemáticos, como matrizes de mudança de base e transformações lineares, a fim de simularmos a representação de objetos tridimensionais em GeoGebra e implementarmos um procedimento para a planificação de prismas regulares retos.

Dinâmica do desdobramento de sólidos geométricos. Uma aplicação com recurso ao ...

A Geometria é o ramo da matemática dedicado ao estudo de questões relacionadas com a posição relativa de objetos e suas propriedades, num determinado espaço. A introdução de referenciais cartesianos para o estudo de elementos geométricos, permite a tradução de problemas algébricos em problemas geométricos e vice-versa, facilitando a sua resolução. O seu estudo promove o raciocínio lógico e o pensamento dedutivo...

On the relative solvability of certain inverse monoids

The notion of kernel of a finite monoid relative to a pseudovariety of groups can be used to define relative solvability of monoids in a similar way to the manner in which the notion of derived subgroup can be used to define solvable group. In this paper we study the solvability of certain inverse monoids relative to pseudovarieties of abelian groups.

Quality of the information : the application in the winification process in win...

Knowledge representation techniques as a way to describe the real world, based on mechanical, logical or other means, will be, always, a function of the systems ability to describe the existing world. Knowledge and belief are generally incomplete, contradictory, or error sensitive, being desirable to use formal tools to deal with the problems that arise from the use of incomplete, contradictory, ambiguous, impe...

Relative abelian kernels of some classes of transformation monoids

We consider members of some well studied classes of finite transformation monoids and give descriptions of their abelian kernels relative to decidable pseudovarieties of abelian groups.

Computing relative abelian kernels of finite monoids

Let H be a pseudovariety of abelian groups corresponding to a recursive supernatural number. In this note we explain how a concrete implementation of an algorithm to compute the kernel of a finite monoid relative to H can be achieved. The case of the pseudovariety Ab of all finite abelian groups was already treated by the second author and plays an important role here, where we will be interested in the prope...

Solvable monoids with commuting idempotents

International Journal of Algebra and Computation, 15, nº 3 (2005), p. 547-570 ; The notion of Abelian kernel of a nite monoid extends the notion of derived subgroup of a nite group. In this line, an extension of the notion of solvable group to monoids is quite natural: they are the monoids such that the chain of Abelian kernels ends with the submonoid generated by the idempotents. We prove in this paper that...

Abelian kernels of monoids of order-preserving maps and of some of its extensions

Semigroup Forum vol. 68 (2004), p. 335–356 ; We compute the abelian kernels of some monoids of partial transformations. More precisely, the cases of the symmetric inverse monoid, monoids of order-preserving or order-reversing transformations and monoids of orientationpreserving or orientation-reversing transformations are treated.