2 papers
math.AG2026
Linear systems on blow-ups of Hirzebruch surfaces
Cyril J. Jacob, Ronnie Sebastian
Motivated by various equivalent versions of the SHGH conjecture for blown up at very general points, we propose a similar conjecture for Hirzebruch surfaces. We prove…
math.AG2025
Seshadri constants and negative curves on blowups of ruled surfaces
Cyril J. Jacob, Bivas Khan, Ronnie Sebastian
In this article we compute Seshadri constants of ample line bundles on the blowup of Hirzebruch surface at very general points. Similarly, we comput…