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math.AG2026
Dihedral reflections and an infinite series of irrational Seshadri constants
Grzegorz Malara, Łukasz Merta, Justyna Szpond +1
Laface and Ugaglia recently constructed an irrational one-point Seshadri constant on the blow-up of at nine very general points by combining a dihedral orbit on $\ma…
math.AG2026
Interpolation matrices and jumping lines of logarithmic bundles
Elena Guardo, Graham Keiper, Grzegorz Malara
We study jumping lines loci of logarithmic bundles associated with finite sets of points in the projective plane. Using the interpolation matrix introduced in [DMTG25], we describe…