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Finiteness of algebraic fundamental groups

Published online by Cambridge University Press:  10 March 2014

Chenyang Xu*
Affiliation:
Beijing International Center of Mathematics Research, 5 Yiheyuan Road, Haidian District, Beijing 100871, China email [email protected]

Abstract

We show that the algebraic local fundamental group of any Kawamata log terminal singularity as well as the algebraic fundamental group of the smooth locus of any log Fano variety are finite.

Type
Research Article
Copyright
© The Author 2014 

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References

Birkar, C., Cascini, P., Hacon, C. and McKernan, J., Existence of minimal models for varieties of log general type, J. Amer. Math. Soc. 23 (2010), 405468.Google Scholar
Greb, D., Kebekus, S. and Peternell, T., Etale covers of Kawamata log terminal spaces and their smooth loci, Preprint (2013), arXiv:1302.1655.Google Scholar
Gurjar, R. and Zhang, D., π 1of smooth points of a log del Pezzo surface is finite. I, II, J. Math. Sci. Univ. Tokyo 1 (1994), 137180; 2 (1995), 165–196.Google Scholar
Hacon, C., McKernan, J. and Xu, C., ACC for log canonical thresholds, Preprint (2012),arXiv:1208.4150.Google Scholar
Hogadi, A. and Xu, C., Degenerations of rationally connected varieties, Trans. Amer. Math. Soc. 361 (2009), 39313949.CrossRefGoogle Scholar
Kapovich, M. and Kollár, J., Fundamental groups of links of isolated singularities, J. Amer. Math. Soc., to appear, arXiv:1109.4047.Google Scholar
Keel, S. and McKernan, J., Rational curves on quasi-projective surfaces, Mem. Amer. Math. Soc. 140 (1999), 669.Google Scholar
Kollár, J., Shafarevich maps and plurigenera of algebraic varieties, Invent. Math. 113 (1993), 177215.Google Scholar
Kollár, J., A conjecture of Ax and degenerations of Fano varieties, Israel J. Math. 162 (2007), 235251.CrossRefGoogle Scholar
Kollár, J., New examples of terminal and log canonical singularities, Preprint (2011),arXiv:1107.2864.Google Scholar
Kollár, J., Links of complex analytic singularities, Preprint (2012), arXiv:1209.1754.Google Scholar
Kollár, J. and Mori, S.,Birational geometry of algebraic varieties, Cambridge Tracts in Mathematics, vol. 134 (Cambridge University Press, Cambridge, 1998).CrossRefGoogle Scholar
Kollár, J. et al. , Flips and abundance for algebraic threefolds, Astérisque, vol. 211 (Société Mathématique de France, Paris, 1992).Google Scholar
Li, C. and Xu, C., Special test configurations and K-stability of Fano varieties, Ann. of Math. (2), to appear, arXiv:1111.5398.Google Scholar
Miyanishi, M. and Tsunoda, S., Logarithmic del Pezzo surfaces of rank one with non-contractible boundaries, Japan. J. Math. 10 (1984), 271319.Google Scholar
Mumford, D., The topology of normal singularities of an algebraic surface and a criterion for simplicity, Publ. Math. Inst. Hautes Études Sci. 9 (1961), 522.Google Scholar
Takayama, S., Local simple connectedness of resolutions of log-terminal singularities, Internat. J. Math. 14 (2003), 825836.Google Scholar
Xu, C., Notes on π 1of smooth loci of log del Pezzo surfaces, Michigan Math. J. 58 (2009), 489515.Google Scholar