$T$-stability for Higgs sheaves over compact complex manifolds
| Autor: | Cardona, S. A. H. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Ann Glob Anal Geom (2015), 48:211-221 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s10455-015-9466-0 |
| Popis: | We introduce the notion of $T$-stability for torsion-free Higgs sheaves as a natural generalization of the notion of $T$-stability for torsion-free coherent sheaves over compact complex manifolds. We prove similar properties to the classical ones for Higgs sheaves. In particular, we show that only saturated flags of torsion-free Higgs sheaves are important in the definition of $T$-stability. Using this, we show that this notion is preserved under dualization and tensor product with an arbitrary Higgs line bundle. Then, we prove that for a torsion-free Higgs sheaf over a compact K\"ahler manifold, $\omega$-stability implies $T$-stabilty. As a consequence of this we obtain the $T$-semistability of any reflexive Higgs sheaf with an admissible Hermitian-Yang-Mills metric. Finally, we prove that $T$-stability implies $\omega$-stability if, as in the classical case, some additional requirements on the base manifold are assumed. In that case, we obtain the existence of admissible Hermitian-Yang-Mills metrics on any $T$-stable reflexive sheaf. Comment: 12 pages, some typos corrected |
| Databáze: | arXiv |
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