Roberto Ladu

collaborators

3 papers

math.GT2026

On smooth structures over $4$ -manifolds with fundamental group of even order

Roberto Ladu, Simone Tagliente

We show that any topological, closed, oriented, non-spin $4$ -manifold with fundamental group $Z_{4 k}$ and $min (b_{2}^{+}, b_{2}^{-}) \geq 15$ , has either none or infinitely many d…

math.GT2025

On $h$ -cobordisms of complexity $2$

Roberto Ladu

We study $5$ -dimensional $h$ -cobordisms of Morgan-SzabÃ³ complexity $2$ . We compute the monopole Floer homology and the action of the twisting involution of the protocork boundary…

math.GT2025

Non-smoothable homeomorphisms of $4$ -manifolds with boundary

Daniel Galvin, Roberto Ladu

We construct the first examples of non-smoothable self-homeomorphisms of smooth $4$ -manifolds with boundary that fix the boundary and act trivially on homology. As a corollary, we…

On smooth structures over 4-manifolds with fundamental group of even order

On h-cobordisms of complexity 2

Non-smoothable homeomorphisms of 4-manifolds with boundary

On smooth structures over $4$ -manifolds with fundamental group of even order

On $h$ -cobordisms of complexity $2$

Non-smoothable homeomorphisms of $4$ -manifolds with boundary