Normal form

The term normal form is used in a variety of contexts:

In Boolean algebra:

• conjunctive normal form
• disjunctive normal form

In relational database theory

• first normal form
• second normal form
• third normal form
• fourth normal form

see Database normalization for all four.

In linear algebra:

• Jordan normal form[?]

To transform something into a normal form is often called normalization[?].