Order

In mathematics

Order (group theory), the cardinality of a group
Order theory, a branch of mathematics that studies various kinds of binary relations known as orders
- Partially ordered set, or poset
- Total order
- Dense order
- Glossary of order theory
Order (ring theory), a kind of an algebraic structure
Orders of approximation in Big O notation
Orders of magnitude, a class of scale or magnitude of any amount
Order, or degree of a polynomial
Order, or dimension of a matrix
Order of a differential equation
Order, in consequence to critical set cardinality in Ramsey theory
Order in the Josephus permutation
Weak order of permutations
Ordered set, a permutation, bijection or cyclic order
Un-ordered subset, or combination
Ordered lists, or tuples and sequences
Complete ordered field of real numbers
Ordered pair
List of order topics in mathematics