From the 1 of 4 linked papers with an AI index.
4 papers
Sutured manifold hierarchies and the Thurston norm
Alessandro V. Cigna
The paper presents an explicit procedure for extracting the Thurston norm of compact oriented irreducible 3‑manifolds from taut sutured manifold hierarchies, and applies this metho…
A formula for the Euler class of foliations
Alessandro V. Cigna
Given a cooriented branched surface fully carrying a foliation , we use the dual graph of to define a simplicial 1-cycle re…
The Thurston norm of graph manifolds
Alessandro V. Cigna
The Thurston norm of a closed oriented graph manifold is a sum of absolute values of linear functionals, and either each or none of the top-dimensional faces of its unit ball are f…
The Thurston norm of 2-bridge link complements
Alessandro V. Cigna
The Thurston norm is a seminorm on the second real homology group of a compact orientable 3-manifold. The unit ball of this norm is a convex polyhedron, whose shape's data (e.g. nu…