Zobrazeno 1 - 10
of 311
pro vyhledávání: '"Yang, Xiaokui"'
Autor:
Xiong, Zhiyao, Yang, Xiaokui
In this paper, we prove conjugate radius estimate, volume comparison and rigidity theorems for K\"ahler manifolds with various curvature conditions.
Externí odkaz:
http://arxiv.org/abs/2408.02080
Autor:
Yang, Xiaokui
In this paper, we establish a K\"ahlerian or projectivity criterion for a class of compact Hermitian surfaces with non-positive second Chern-Ricci curvature.
Externí odkaz:
http://arxiv.org/abs/2407.05660
Autor:
Yang, Xiaokui, Zhang, Liangdi
In this paper, we introduce a new positivity notion for curvature of Riemannian manifolds and obtain characterizations for spherical space forms and the complex projective space $\mathbb{C}\mathbb{P}^n$.
Externí odkaz:
http://arxiv.org/abs/2312.16068
Publikováno v:
Jichu yixue yu linchuang, Vol 44, Iss 5, Pp 651-657 (2024)
Objective To study the expression and subcellular distribution pattern of centriolar protein SAS-6 during meiosis of mouse oocytes. Methods Immunefluorescence was conducted to analyze the subcellular distribution pattern of SAS-6 in Chinese hamster o
Externí odkaz:
https://doaj.org/article/4aa1cac23afa4ec79a0d9d8926e81d63
Publikováno v:
J. Lond. Math. Soc. (2), Vol. 109 (2024), no. 6, Paper No. e12942, 26 pp
Let $(X,\Delta)$ be a projective klt pair, and $f:X\to Y$ a fibration to a smooth projective variety $Y$ with strictly nef relative anti-log canonical divisor $-(K_{X/Y}+\Delta)$. We prove that $f$ is a locally constant fibration with rationally conn
Externí odkaz:
http://arxiv.org/abs/2111.05234
Autor:
Chen, Wenjin, Tian, Yichang, Gou, Mengzhuang, Wang, Leilei, Tong, Jinghui, Zhou, Yanfang, Feng, Wei, Li, Yanli, Chen, Song, Liu, Yongchang, Wang, Zhiren, Pan, Shujuan, Zhang, Ping, Huang, Junchao, Yang, Xiaokui, Li, Chiang-Shan R., Tian, Li, Hong, L. Elliot, Tan, Yunlong
Publikováno v:
In Progress in Neuropsychopharmacology & Biological Psychiatry 2 March 2024 130
In this note, we give a brief exposition on the differences and similarities between strictly nef and ample vector bundles, with particular focus on the circle of problems surrounding the geometry of projective manifolds with strictly nef bundles.
Externí odkaz:
http://arxiv.org/abs/2009.01052
Autor:
Yang, Xiaokui
Let $X$ be a compact K\"ahler manifold. We prove that if $X$ admits a smooth Hermitian metric $\omega$ with quasi-positive second Chern-Ricci curvature $\mathrm{Ric}^{(2)}(\omega)$, then $X$ is projective and rationally connected. In particular, $X$
Externí odkaz:
http://arxiv.org/abs/2006.13884
Suppose that $X$ is a projective manifold whose tangent bundle $T_X$ contains a locally free strictly nef subsheaf. We prove that $X$ is isomorphic to a projective bundle over a hyperbolic manifold. Moreover, if the fundamental group $\pi_1(X)$ is vi
Externí odkaz:
http://arxiv.org/abs/2004.08507
Autor:
Wang, Jun, Yang, Xiaokui
Let $(M,g,J)$ be a Riemannian manifold with a compatible integrable complex structure $J\in\mathrm{End}(T_\mathbb{R} M)$ and $\mathcal{A}_{g,J}$ be the space of real connections on $T_\mathbb{R} M$ preserving both $g$ and $J$. In this paper, we inves
Externí odkaz:
http://arxiv.org/abs/1912.12024