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Soluções fracas de equações de fluido em meios porosos
(Universidade Federal de Santa Maria, 2009-12-21)
In this work we study equations that describe laminar flow through a rigid isotropic granular (non consolidated) porous medium subjected to a external force field.
Firstly we present the meaning of the many phisical terms ...
S-anéis, anel centralizador e grupos com loops transversais
(Universidade Federal de Santa Maria, 2009-01-20)
In this work, we present the concepts of loop transversal, centralizer ring and S-ring over a permutation group. The connection between these three subjects was obtained by Kenneth W. Johnson, where he translated the results ...