A Theorem by Gallo, Goldman and Porter states the following: Let $S_g$ be a closed orientable surface of genus $g$ with fundamental group $\Gamma_g$, and fix a non-elementary representation ...
I am looking for the reference to the following theorem. I have to apply a similar statement, and it would be nice to trace the source. Please note, I know few proofs in fact it is Problem 3 in my ...
Is there a surface in $\mathbb R^3$ which is a closed subset and whose curvature is negative and bounded away from zero? And the small-print... By surface I mean smooth surface without ...
Suppose $S$ is an algebraic surface (possibly projective) over an algebraically closed field $k$. Suppose $D_i$ are irreducible smooth curves (rational, if you want) with negative self-intersection ...
Hi, Fisrt I would like to say that geometry is far away from my domain. I have encountered a problem that has a geometric formulation and I don't even know if this is a difficult or an easy ...