In mathematics, a countable set is a set with the same cardinality (i.e., number of elements) as some subset of the set of natural numbers. The term was originated by Georg Cantor ...

In set theory, a set is called hereditarily countable if and only if it is a countable set of hereditarily countable sets. This inductive definition is in fact well-founded and can ...

From the Simple English Wikipedia, the free encyclopedia that anyone can change

Wikipedia encyclopedia? ... A countable set has "countably many" elements. If the ... Free Tools: For surfers: Browser extension | Word of ...

Table of Contents. 1 Definition; 2 Gentle introduction. 2.1. A more formal introduction; 2.2. Further theorems about uncountable sets; 3 See also; In mathematics the term countable ...

Wikipedia encyclopedia? ... A countable set has "countably many" elements. If the ... Free Tools: For surfers: Browser extension | Word of ...

Wikipedia encyclopedia? ... Countable set Countable set Countable sets Countable space ... Free Tools: For surfers: Browser extension | Word of ...

From Wikipedia, the free encyclopedia ... In mathematics, a countable set is a set with the same cardinality (i.e., number of ...

Countable set: Wikipedia, the Free Encyclopedia [home, info] Computing (1 matching dictionary) Countable set: Encyclopedia [home, info] Science (1 matching dictionary)

In mathematics , an axiom of countability is a property of certain mathematical objects (usually in a category ) that requires the existence of a countable set with certain ...