Deformations of nearly Kähler instantons

We formulate the deformation theory for instantons on nearly Kähler six-manifolds using spinors and Dirac operators. Using this framework we identify the space of deformations of an irreducible instanton with semisimple structure group with the kernel of an elliptic operator, and prove that abelian instantons are rigid. As an application, we show that the canonical connection on three of the four homogeneous nearly Kähler six-manifolds G/H is a rigid instanton with structure group H. In contrast, these connections admit large spaces of deformations when regarded as instantons on the tangent bundle with structure group SU(3)

Zoneamento Agroecológico do município de Ponta Porã/MS.

bitstream/item/25433/1/bpd137-2009-ponta-pora-ms.pd

A última aula de Antonio Barros de Castro

Seis dias antes de seu falecimento, o professor Antonio Barros de Castro proferiu a primeira aula de seu curso na pós-graduação do Instituto de Economia da UFRJ, a qual seria a última de sua vida. Nessa aula, apresentou sua atual agenda de pesquisa, que procurava articular os temas em que concentrava seu estudo e reflexão atuais - a ascensão da China no cenário mundial, a crise financeira do Ocidente e os desafios da economia brasileira diante deste novo mundo que está emergindo Apresentamos aqui uma síntese organizada das notas que tomamos daquela aula, acrescidas de algumas observações que contribuem para contextualizá-las no conjunto das preocupações de Castro

As convenções de desenvolvimento no governo Lula: um ensaio de economia política

Development conventions in Lula's mandates: an essay on political economy. This article analyses the different development proposals put forward during the two Lula Presidential mandates. It is argued that such proposals are structured as "development conventions", which involve different priorities and different solutions to the problem of structural transformation. Their analytical frame is also different as are the interest groups which uphold them. Therefore their epistemology must be placed in the political economy context. It is argued that, notwithstanding the weight gained by a "developmental" convention over the second mandate, a "stability" convention is still hegemonic and commands macroeconomic policies