## You are here

Homemonomial

## Primary tabs

# monomial

A *monomial* is a product of non-negative powers of variables. It may also include an optional coefficient (which is sometimes ignored when discussing particular properties of monomials). A polynomial can be thought of as a sum over a set of monomials.

For example, the following are monomials.

$\begin{array}[]{ccc}1&x&x^{2}y\\ \\ xyz&3x^{4}y^{2}z^{3}&-z\end{array}$ |

If there are $n$ variables from which a monomial may be formed, then a monomial may be represented without its coefficient as a vector of $n$ naturals. Each position in this vector would correspond to a particular variable, and the value of the element at each position would correspond to the power of that variable in the monomial. For instance, the monomial $x^{2}yz^{3}$ formed from the set of variables $\left\{w,x,y,z\right\}$ would be represented as $\begin{pmatrix}0&2&1&3\end{pmatrix}^{T}$. A constant would be a zero vector.

Given this representation, we may define a few more concepts. First, the
*degree of a monomial* is the sum of the elements of its vector representation. Thus, the degree of $x^{2}yz^{3}$ is $0+2+1+3=6$,
and the degree of a constant is 0. If a polynomial is represented as a sum
over a set of monomials, then the degree of a polynomial can be defined as the
degree of the monomial of largest degree belonging to that polynomial.

## Mathematics Subject Classification

12-00*no label found*

- Forums
- Planetary Bugs
- HS/Secondary
- University/Tertiary
- Graduate/Advanced
- Industry/Practice
- Research Topics
- LaTeX help
- Math Comptetitions
- Math History
- Math Humor
- PlanetMath Comments
- PlanetMath System Updates and News
- PlanetMath help
- PlanetMath.ORG
- Strategic Communications Development
- The Math Pub
- Testing messages (ignore)

- Other useful stuff

## Recent Activity

new correction: Error in proof of Proposition 2 by alex2907

Jun 24

new question: A good question by Ron Castillo

Jun 23

new question: A trascendental number. by Ron Castillo

Jun 19

new question: Banach lattice valued Bochner integrals by math ias