first axiom of countability


noun Mathematics.


Nearby words

  1. first,
  2. first aid,
  3. first amendment,
  4. first and foremost,
  5. first and last,
  6. first balkan war,
  7. first base,
  8. first baseman,
  9. first blood,
  10. first blush

axiom of countability

noun Mathematics.

the property satisfied by a topological space in which the neighborhood system of each point has a base consisting of a countable number of neighborhoods (first axiom of countability) or the property satisfied by a topological space that has a base for its topology consisting of a countable number of subsets of the space (second axiom of countability).
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