3 papers
math.DG2026
On the construction of K-contact non-Sasakian Smale-Barden manifolds
Vicente Muñoz, Juan Rojo
In the breakthrough paper \cite{Mu-jems}, it is constructed the first example of a simply connected compact -manifold (aka.\ Smale-Barden manifold) which admits a K-contact stru…
math.RA2026
8-dimensional 2-step nilpotent Lie algebras over algebraically closed fields of char
Giovanni Bazzoni, Juan Rojo
We provide a self contained, elementary, and geometrically-flavored classification of -dimensional -step nilpotent Lie algebras over algebraically closed fields of characteri…
math.SG2025
Constructions of symplectic surfaces in symplectic 4-manifolds with transversal intersections
Vicente Muñoz, Juan Rojo
In the breakthrough paper [V. Muñoz, A Smale-Barden manifold admitting K-contact but not Sasakian structure, 2024, 10.4171/JEMS/1496], it is constructed the first example of a sim…