On stability of tautological bundles and their total transforms (Q2283069)
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| Language | Label | Description | Also known as |
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| English | On stability of tautological bundles and their total transforms |
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On stability of tautological bundles and their total transforms (English)
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27 December 2019
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For $C$ a smooth projective curve of genus $g\geq 1$ over an algebraically closed field of characeristic $0$ and $E$ a globally generated vector bundle on $C$, the author of this paper considers the Lazarsfeld-Mukai bundle, $M_{E}:=\ker(H^{0}(C,E)\otimes\mathcal{O} \rightarrow E$, which he calls the \textit{total transform bundle}. The aim of this paper is to give examples of stability of the total transform bundle $M_{E}$ on high dimensional varieties. More precisely, if we let $L$ be a line bundle on $C$ of degree $d$, $S^{n}C$ the symmetric product of $C$, $\tilde{H}$ the natural polarization on $S^{n}C$ and $L^{[n]}$ the tautological bundle on $S^{n}C$, then in the main theorem of this paper the author proves that: 1. if $d\geq n$ then $L^{[n]}$ is $\tilde{H}$-stable and 2. if $d\geq n+2g$ then $M_{L^{[n]}}$ is $\tilde{H}$-stable. For background see [\textit{L. Ein} and \textit{R. Lazarsfeld}, Lond. Math. Soc. Lect. Note Ser. 179, 149--156 (1992; Zbl 0768.14012); Math. Res. Lett. 20, No. 1, 73--80 (2013; Zbl 1299.14038)] and [\textit{A. Krug}, Math. Res. Lett. 27, No. 6, 1785--1800 (2020; Zbl 1466.14052)].
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vector bundles on projective varieties
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stability of vector bundles
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