• Title/Summary/Keyword: vanishing theorem

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VANISHING OF PROJECTIVE VECTOR FIELDS ON COMPACT FINSLER MANIFOLDS

  • Shen, Bin
    • Journal of the Korean Mathematical Society
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    • v.55 no.1
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    • pp.1-16
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    • 2018
  • In this paper, we give characteristic differential equations of a kind of projective vector fields on Finsler manifolds. Using these equations, we prove the vanishing theorem of projective vector fields on any compact Finsler manifold with the negative mean Ricci curvature, which is defined in [10]. This result involves the vanishing theorem of Killing vector fields in the Riemannian case and the work of [1, 14].

VANISHING THEOREM ON SINGULAR MODULI SPACES

  • Cho, Yong-Seung;Hong, Yoon-Hi
    • Journal of the Korean Mathematical Society
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    • v.33 no.4
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    • pp.1069-1099
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    • 1996
  • Let X be a smooth, simply connected and oriented closed fourmanifold such that the dimension $b_{2}^{+}(X)$ of a maximal positive subspace for the intersection form is greater than or equal to 3.

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RIGIDITY OF COMPLETE RIEMANNIAN MANIFOLDS WITH VANISHING BACH TENSOR

  • Huang, Guangyue;Ma, Bingqing
    • Bulletin of the Korean Mathematical Society
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    • v.56 no.5
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    • pp.1341-1353
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    • 2019
  • For complete Riemannian manifolds with vanishing Bach tensor and positive constant scalar curvature, we provide a rigidity theorem characterized by some pointwise inequalities. Furthermore, we prove some rigidity results under an inequality involving $L^{\frac{n}{2}}$-norm of the Weyl curvature, the traceless Ricci curvature and the Sobolev constant.

LOCALLY PRODUCT INDEFINITE KAEHLERIAN METRICS WITH VANISHING CONFORMAL CURVATURE TENSOR FIELD

  • Kwon, Jung-Hwan;Sohn, Won-Ho
    • Bulletin of the Korean Mathematical Society
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    • v.29 no.1
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    • pp.25-29
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    • 1992
  • The purpose of this paper is to study indefinite Kaehlerian metrics with vanishing conformal curvature tensor field. In the first section, a brief summary of the complex version of indefinite Kaehlerian manifolds is recalled and we introduce the conformal curvature tensor field on an indefinite Kaehlerian manifold. In section 2, we obtain the theorem for indefinite Kaehlerian metrics with vanishing conformal curvature tensor field.

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Vanishing Points Detection in Indoor Scene Using Line Segment Classification (선분분류를 이용한 실내영상의 소실점 추출)

  • Ma, Chaoqing;Gwun, Oubong
    • The Journal of the Korea Contents Association
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    • v.13 no.8
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    • pp.1-10
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    • 2013
  • This paper proposes a method to detect vanishing points of an indoor scene using line segment classification. Two-stage vanishing points detection is carried out to detect vanishing point in indoor scene efficiently. In the first stage, the method examines whether the image composition is a one-point perspective projection or a two-point one. If it is a two-point perspective projection, a horizontal line through the detected vanishing point is found for line segment classification. In the second stage, the method detects two vanishing points exactly using line segment classification. The method is evaluated by synthetic images and an image DB. In the synthetic image which some noise is added in, vanishing point detection error is under 16 pixels until the percent of the noise to the image becomes 60%. Vanishing points detection ratio by A.Quattoni and A.Torralba's image DB is over 87%.