Extremality and rigidity for scalar curvature in dimension four
Extremality and rigidity for scalar curvature in dimension four
复制标题
四维标量曲率的极值和刚度
DOI:
10.1007/s00029-023-00892-5
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发表时间:
2024
期刊:
影响因子:
--
通讯作者:
Goodman, McFeely Jackson
中科院分区:
文献类型:
--
作者:
Bettiol, Renato G.;Goodman, McFeely Jackson
Following Gromov, a Riemannian manifold is called area-extremal if any modification that increases scalar curvature must decrease the area of some tangent 2-plane. We prove that large classes of compact 4-manifolds, with or without boundary, with nonnegative sectional curvature are area-extremal. We also show that all regions of positive sectional curvature on 4-manifolds are locally area-extremal. These results are obtained analyzing sections in the kernel of a twisted Dirac operator constructed from pairs of metrics, and using the Finsler–Thorpe trick for sectional curvature bounds in dimension 4.
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影响因子:
1.2
作者:
Bettiol, Renato G.;Kummer, Mario;Mendes, Ricardo A.
通讯作者:
Mendes, Ricardo A.
DOI:
10.3842/sigma.2024.035
发表时间:
2023
期刊:
Symmetry, Integrability and Geometry: Methods and Applications
影响因子:
--
作者:
Christian Baer;S. Brendle;B. Hanke;Yipeng Wang
通讯作者:
Yipeng Wang
影响因子:
1.9
作者:
G. Grubb
通讯作者:
G. Grubb
影响因子:
0.5
作者:
S. Goette;U. Semmelmann
通讯作者:
U. Semmelmann
影响因子:
3.3
作者:
M. Noronha
通讯作者:
M. Noronha