Every complex projective algebraic surface S satises the inequality $9\chi(\mathcal{O}_S) \geq c_1^2

Complex algebraic surfaces of general type with $p_g=q=1$ are still not completely understood. Until

Representations of surface groups into SL(3,C) are parameterized by conjugacy classes. When classes

e um resultado clássico que as transformações canónicas (simplecticas) preservam o volume, mas s

Um grupo de Burnside e um grupo finitamente gerado, infinito e tal que todos os elementos são de To

Given a volume form on an oriented Poisson manifold one can define the curl (or modular) vector fiel

Apresentamos algumas propriedades dos bialgebróides quasi-Lie e quasi-Jacobi, analisando nomeadamen

A rational ruled surface is a P^1 bundle over P^1. The infinitesimal deformation theory of these sur

Sem assumir conhecimento previo do princípio-h, explicar-se-á a sua aplicação para provar a exis

The space of representations of the fundamental group of a surface into a Lie group is a natural obj