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math.AG2024
Rationality of Seshadri constants on blow-ups of ruled surfaces
Krishna Hanumanthu, Cyril J. Jacob, Suhas B. N. +1
In this note, we continue the study of Seshadri constants on blow-ups of Hirzebruch surfaces initiated in arXiv:2312.14555. Now we consider blow-ups of ruled surfaces more generall…
math.AG2024
Effective cone of a Grassmann bundle over a curve defined over
Indranil Biswas, Shripad M. Garge, Krishna Hanumanthu
Let be an irreducible smooth projective curve defined over and a vector bundle on of rank at least two. For any $1\, \leq\, r\, <\, {\rm rank}(…