Cardinality

1 definition found

From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:

  cardinality
       
           The number of elements in a set.  If two sets
          have the same number of elements (i.e. there is a {bijection}
          between them) then they have the same cardinality.  A
          cardinality is thus an {isomorphism class} in the {category}


          of sets.
       
          {aleph 0} is defined as the cardinality of the first
          {infinite} {ordinal}, {omega} (the number of {natural
          number}s).
       
          (1995-03-29)