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The Melipona scutellaris (Urucu) is a Brazilian northeast endemic bee species, it is important not alone for the production of honey and pollen, but also for the polinization of Fanerogamas.(More)
Two theorems on the Riemannian geometrical constraints on vortex magnetic filaments acting as dynamos in (MHD) flows are presented. The use of Gauss–Mainard–Codazzi equations allows us to investigate(More)