English Explanatory Dictionary

Listing number

English dictionary entry

Meanings

noun
  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.

Word forms

Listing number Listing numbers

Etymology

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

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