短語詞組短語Betti deficiency number Betti 虧數(shù)graded Betti number 分次Betti數(shù)The first Betti number 第一Betti數(shù)Betti de ciency number Betti 虧數(shù)betti number of riemannian manifold 黎曼流形的貝蒂數(shù) 返回 betti number