bisectional การใช้

• This K鋒ler metric has nonpositive bisectional curvature, negative holomorphic sectional curvature, and Ricci curvature, both with negative upper bound.
• A remarkable feature of complex geometry is that holomorphic sectional curvature decreases on complex submanifolds . ( The same goes for a more general concept, holomorphic bisectional curvature . ) For example, every complex submanifold of "'C " "'n " ( with the induced metric from "'C " "'n " ) has holomorphic sectional curvature d " 0.