# What are Legendre functions used for?

## What are Legendre functions used for?

For example, Legendre and Associate Legendre polynomials are widely used in the determination of wave functions of electrons in the orbits of an atom [3], [4] and in the determination of potential functions in the spherically symmetric geometry [5], etc.

## What is N in Legendre equation?

Legendre’s polynomial of degree n, denoted Pn(x), is a solution (there are two) to the differential equation. ( 1 − x 2 ) y ″ ( x ) − 2 x y ′ ( x ) + n ( n + 1 ) y ( x ) = 0 , − 1 < x < 1.

What is Jacobi series?

The representation of analytic functions as convergent series in Jacobi polynomials is reformulated using the Hadamard principal part of integrals for all . The coefficients of the series are given as usual integrals in the classical case (when ) or by their Hadamard principal part when they diverge.

### What is meant by Legendre polynomial?

In physical science and mathematics, Legendre polynomials (named after Adrien-Marie Legendre, who discovered them in 1782) are a system of complete and orthogonal polynomials, with a vast number of mathematical properties, and numerous applications.

### How is Legendre calculated?

Rules To Find Legendre Symbol

1. (a/n) = (b/n) if a = b mod n.
2. (1/n) = 1 and (0/n) = 0.
3. (2m/n) = (m/n) if n = ±1 mod 8. Otherwise (2m/n) = -(m/n).
4. (Quadratic reciprocity) If m and n are both odd, then (m/n) = (n/m) unless both m and n are congruent to 3 mod 4, in which case (m/n) = -(n/m).

What is Gauss Jacobi method?

The Jacobi iterative method is considered as an iterative algorithm which is used for determining the solutions for the system of linear equations in numerical linear algebra, which is diagonally dominant. In this method, an approximate value is filled in for each diagonal element.

## Why do we use orthogonal polynomial regression?

Orthogonal polynomial regression is appropriate and sometimes necessary for higher order polynomial fits, i.e., five degrees and higher. Orthogonal polynomial regression can be used in place of polynomial regression at any time.

## Why are orthogonal polynomials important?

Take Home Message: Orthogonal Polynomials are useful for minimizing the error caused by interpolation, but the function to be interpolated must be known throughout the domain. The use of orthogonal polynomials, rather than just powers of x, is necessary when the degree of polynomial is high.

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