# Set theory/Related Articles

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A list of Citizendium articles, and planned articles, about Set theory.

## Subtopics

• Axiom of choice [r]: Set theory assertion that if S is a set of disjoint, non-empty sets, then there exists a set containing exactly one member from each member of S. [e]
• Boolean algebra [r]: A form of logical calculus with two binary operations AND (multiplication, •) and OR (addition, +) and one unary operation NOT (negation, ~) that reverses the truth value of any statement. [e]
• Cardinality [r]: The size, i.e., the number of elements, of a (possibly infinite) set. [e]
• Power set [r]: The set of all subsets of a given set. [e]
• Set (mathematics) [r]: Informally, any collection of distinct elements. [e]
• Venn diagram [r]: A visual representation of inclusion relations of sets or logical propositions by arrangements of regions in the plane. [e]
• Zermelo-Fraenkel axioms [r]: One of several possible formulations of axiomatic set theory. [e]