Word.ws English Dictionary

Betti numbers

Betti numbers is the plural of Betti number.

Meaning of Betti number

Noun

Betti number (plural Betti numbers)

  1. Any of a sequence of numbers, denoted bₙ, which characterise a given topological space K by giving, for each dimension, the number of holes in K of said dimension; (formally) the rank of the nth homology group, Hₙ, of K.
    • Poincaré proved that Betti numbers are invariants and used them to extend Euler's polyhedral formula to higher dimensional spaces.

Questions about Betti numbers

What is Betti numbers the plural of?
Betti numbers is the plural of Betti number.

Words near Betti numbers in the dictionary

  1. bettest
  2. betteth
  3. betther
  4. Betti
  5. Betti number
  6. Betti numbers
  7. Bettie
  8. bettied
  9. betties
  10. Bettin
  11. bettin'

Source and license

Adapted from Wiktionary: Betti numbers (page history and authors); Betti number (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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