• 대한수학회보
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• 제39권2호
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• pp.327-332
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• 2002

In this paper we prove that if M is a J-invariant sub-manifold of codimension 2 in a complex projective space $P_{n+1}(C)$, and the second fundamental tensor is cyclic-parallel or M has harmonic curvature, then M is locally complex quadric Q$_n$(C) or P$_n$(C).

• 대한수학회논문집
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• 제12권2호
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• pp.373-382
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• 1997

When the target manifold is a Sasakian or cosympletic space form, we characterize invariant immersions, tangential anti-invariant immersions and normal anti-invariant immersions by the spectra of the Jacobi operator.

• 대한수학회논문집
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• 제18권2호
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• pp.309-323
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• 2003

In this paper, We characterize a semi-invariant sub-manifold of codimension 3 satisfying ∇$\varepsilon$A = 0 in a complex projective space CP$\^$n+1/, where ∇$\varepsilon$A is the covariant derivative of the shape operator A in the direction of the distinguished normal with respect to the structure vector field $\varepsilon$.

• 대한수학회지
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• 제16권1호
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• pp.63-69
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• 1979

• Kyungpook Mathematical Journal
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• 제16권1호
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• pp.33-47
• /
• 1976

• 대한수학회지
• /
• 제14권1호
• /
• pp.71-80
• /
• 1977

• 대한수학회지
• /
• 제16권2호
• /
• pp.177-187
• /
• 1980

• 대한수학회지
• /
• 제11권2호
• /
• pp.135-139
• /
• 1974

• 대한수학회지
• /
• 제17권1호
• /
• pp.113-122
• /
• 1980

• 대한수학회지
• /
• 제9권2호
• /
• pp.49-57
• /
• 1972