Geometria

Through works by renowned architects such as Antoni Gaudí, Felix Candela and Oscar Niemeyer, this film intends to show the natural way in which the formulas, the geometry of forms and their concretization are intertwined.

Através de obras de arquitetos de renome como  Antoni Gaudí, Felix Candela e Oscar Niemeyer, este filme pretende evidenciar a forma natural como se entrelaçam as fórmulas, a geometria das formas e a sua concretização.

O vídeo insere-se no projeto Geometria Intuitiva e Interativa (GI2). Mais informações em http://www.gi2.pt/ .

Mirror symmetry for Nahm branes

Por Emílio Franco (Universidade do Porto).

Abstract: Using the Dirac–Higgs bundle, we consider a new class of space-filling (BBB)-branes on moduli spaces of Higgs bundles, given by a generalized Nahm transform of a stable Higgs bundle. We then use the Fourier–Mukai–Nahm transform to describe its dual brane, which is checked to be a (BAA)-brane supported on a complex Lagrangian multisection of the Hitchin fibration.

Topological Lattice Models in Geometry and Physics

Björn Gohla
GFM, Universidade de Lisboa

Abstract: Lattice models arise in physics as discrete approximations of quantum field theories (QFT). Topological quantum field theories (TQFT) on the other hand by definition are QFTs, that can be defined on smooth or topological space-times, as opposed to the usual pseudo-Riemannian space-times required by QFTs. Interesting TQFTs can be defined as lattice models, giving exactly solvable models in 2 dimensions for example.

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