Listing number

短语

词形变化

Listing numbers 复数 Listing numbers

释义与例句

n.
  1. 1.

    Any of four topological invariants associated with a topological space. The smallest Listing number counts the number of connected components of a space, and is thus equivalent to the zeroth Betti number.

    数学

词源

These numbers were introduced by the 19th-century mathematician Johann Benedict Listing, and later given this name by Charles Sanders Peirce.

来源：wiktionary