“connectivity number”的概念、定义、翻译、参考文献-科学参考

单词	connectivity number
释义	connectivity number [kǝ´nek`tiv·ǝd·ē ´nǝm·bǝr] ^MATHEMATICS 1. The number of points plus 1 which can be removed from a curve without separating the curve into more than one piece. 2. The number of closed cuts or cuts joining points of previous cuts (or joining points on the boundary) plus 1 which can be made on a surface without separating the surface. Also known as Betti number. 3. In general, the n-dimensional connectivity number of a topological space X is the number of infinite cyclic groups whose direct sum with the torsion group G_n(X ) forms the homology group H_n(X ).
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