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Monomial basis

In mathematics a monomial basis is a way to uniquely describe a polynomial using a linear combination of monomials. This description, the monomial form of a polynomial, is often used because of the simple structure of the monomial basis.

Polynomials in monomial form can be evaluated efficiently using the Horner algorithm.

Contents
1 Definition
2 Notes
3 Examples
4 See also

Definition

The monomial basis for the vector space Πn of polynomials with degree n is the polynomial sequence of monomials

1,x,x^2,.\ldots,x^n

The monomial form of a polynomial p \in \Pi_n is a linear combination of monomials

a_0 1 + a_1 x + a_2 x^2 + \ldots + a_n x^n

alternatively the shorter sigma notation can be used

p=\sum_{\nu=0}^n a_{\nu}x^\nu

Notes

A polynomial can always converted into monomial form by calculating Taylor expansion around 0.

Examples

A polynomial in Π4

1 + x + 3x4

See also

Science Fair Project Encyclopedia Contents Page
09-23-2007 01:00:40
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