• Title/Summary/Keyword: Yun-Ji

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빅데이터의 의학적 활용

  • Kim, Ji-Hyeon;Kim, Hong;Son, Gwang-Eun;Song, Yun-Su;Yun, Ji-Hye;Im, Hui-Chang;Jeong, Sang-Ho;Jeon, Ju-Hong
    • Communications of the Korean Institute of Information Scientists and Engineers
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    • v.32 no.3
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    • pp.18-26
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    • 2014

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ON $\eta$K-CONFORMAL KILLING TENSOR IN COSYMPLECTIC MANIFOLD WITH VANISHING COSYMPLECTIC BOCHNER CURVATURE TENSOR$^*$

  • Jun, Jae-Bok;Kim, Un-Kyu
    • Bulletin of the Korean Mathematical Society
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    • v.32 no.1
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    • pp.25-34
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    • 1995

  • S. Tachibana [10] has defined a confornal Killing tensor in a n-dimensional Riemannian manifold M by a skew symmetric tensor $u_[ji}$ satisfying the equation $$ \nabla_k u_{ji} + \nabla_j u_{ki} = 2\rho_i g_{kj} - \rho_j g_{ki} - \rho_k g_{ji}, $$ where $g_{ji}$ is the metric tensor of M, $\nabla$ denotes the covariant derivative with respect to $g_{ji}$ and $\rho_i$ is a associated covector field of $u_{ji}$. In here, a covector field means a 1-form.

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