Seshadri constants and negative curves on blowups of ruled surfaces
Abstract
In this article we compute Seshadri constants of ample line bundles on the blowup of Hirzebruch surface Fe at r≤slant e+3 very general points. Similarly, we compute Seshadri constants on the blowups of certain decomposable ruled surfaces over smooth curves of non-zero genus. We also prove some results related to bounded negativity of blowups of Hirzebruch surfaces and ruled surfaces.
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