Legendre's Equation, sturm liouville - eigenvalues/eigenfunction











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Linear Differential Equation,Legendre's Equation, sturm liouville - eigenvalues/eigenfunction




Consider the linear differential operator:
$$ L = frac{1}{4}(1+x^2)frac{d^2}{dx^2}+frac{1}{2}x(1+x^2)frac{d}{dx}+a $$
acting on functions defined in $-1 le x le 1$ and vanishing at the endpoints of the interval.


(a) Is $L$ Hermitian?

(b) Determine the weight function necessary to make $L$ Hermitian.

(c) Show explicitly that
$$
int_{-1}^{1}V^*(x)W(x)Lu(x)dx = int_{-1}^{1}(LV)^*W(x)u(x)dx
$$

and thereby determine the condition on 'a'.

(d) Change variables to
$$ x= tanleft(frac{Theta}{2}right) $$
Find $2$ even eigenfunctions $f_1(x)$ and $f_2(x)$ of the diferential equation
$$ Lu=lambda u. $$




It's my first time posting question, so wasn't sure how to type the differential equation.










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  • Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
    – José Carlos Santos
    Nov 25 at 14:21










  • I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
    – cisko
    Nov 25 at 15:11










  • You can take a look at how I edited your question. That will help you learn MathJax for the next time.
    – DisintegratingByParts
    Nov 25 at 20:33










  • Thank you so much
    – cisko
    Nov 26 at 21:02















up vote
-3
down vote

favorite












Linear Differential Equation,Legendre's Equation, sturm liouville - eigenvalues/eigenfunction




Consider the linear differential operator:
$$ L = frac{1}{4}(1+x^2)frac{d^2}{dx^2}+frac{1}{2}x(1+x^2)frac{d}{dx}+a $$
acting on functions defined in $-1 le x le 1$ and vanishing at the endpoints of the interval.


(a) Is $L$ Hermitian?

(b) Determine the weight function necessary to make $L$ Hermitian.

(c) Show explicitly that
$$
int_{-1}^{1}V^*(x)W(x)Lu(x)dx = int_{-1}^{1}(LV)^*W(x)u(x)dx
$$

and thereby determine the condition on 'a'.

(d) Change variables to
$$ x= tanleft(frac{Theta}{2}right) $$
Find $2$ even eigenfunctions $f_1(x)$ and $f_2(x)$ of the diferential equation
$$ Lu=lambda u. $$




It's my first time posting question, so wasn't sure how to type the differential equation.










share|cite|improve this question
























  • Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
    – José Carlos Santos
    Nov 25 at 14:21










  • I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
    – cisko
    Nov 25 at 15:11










  • You can take a look at how I edited your question. That will help you learn MathJax for the next time.
    – DisintegratingByParts
    Nov 25 at 20:33










  • Thank you so much
    – cisko
    Nov 26 at 21:02













up vote
-3
down vote

favorite









up vote
-3
down vote

favorite











Linear Differential Equation,Legendre's Equation, sturm liouville - eigenvalues/eigenfunction




Consider the linear differential operator:
$$ L = frac{1}{4}(1+x^2)frac{d^2}{dx^2}+frac{1}{2}x(1+x^2)frac{d}{dx}+a $$
acting on functions defined in $-1 le x le 1$ and vanishing at the endpoints of the interval.


(a) Is $L$ Hermitian?

(b) Determine the weight function necessary to make $L$ Hermitian.

(c) Show explicitly that
$$
int_{-1}^{1}V^*(x)W(x)Lu(x)dx = int_{-1}^{1}(LV)^*W(x)u(x)dx
$$

and thereby determine the condition on 'a'.

(d) Change variables to
$$ x= tanleft(frac{Theta}{2}right) $$
Find $2$ even eigenfunctions $f_1(x)$ and $f_2(x)$ of the diferential equation
$$ Lu=lambda u. $$




It's my first time posting question, so wasn't sure how to type the differential equation.










share|cite|improve this question















Linear Differential Equation,Legendre's Equation, sturm liouville - eigenvalues/eigenfunction




Consider the linear differential operator:
$$ L = frac{1}{4}(1+x^2)frac{d^2}{dx^2}+frac{1}{2}x(1+x^2)frac{d}{dx}+a $$
acting on functions defined in $-1 le x le 1$ and vanishing at the endpoints of the interval.


(a) Is $L$ Hermitian?

(b) Determine the weight function necessary to make $L$ Hermitian.

(c) Show explicitly that
$$
int_{-1}^{1}V^*(x)W(x)Lu(x)dx = int_{-1}^{1}(LV)^*W(x)u(x)dx
$$

and thereby determine the condition on 'a'.

(d) Change variables to
$$ x= tanleft(frac{Theta}{2}right) $$
Find $2$ even eigenfunctions $f_1(x)$ and $f_2(x)$ of the diferential equation
$$ Lu=lambda u. $$




It's my first time posting question, so wasn't sure how to type the differential equation.







eigenfunctions legendre-polynomials sturm-liouville






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edited Nov 25 at 20:31









DisintegratingByParts

58.1k42477




58.1k42477










asked Nov 25 at 14:19









cisko

61




61












  • Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
    – José Carlos Santos
    Nov 25 at 14:21










  • I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
    – cisko
    Nov 25 at 15:11










  • You can take a look at how I edited your question. That will help you learn MathJax for the next time.
    – DisintegratingByParts
    Nov 25 at 20:33










  • Thank you so much
    – cisko
    Nov 26 at 21:02


















  • Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
    – José Carlos Santos
    Nov 25 at 14:21










  • I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
    – cisko
    Nov 25 at 15:11










  • You can take a look at how I edited your question. That will help you learn MathJax for the next time.
    – DisintegratingByParts
    Nov 25 at 20:33










  • Thank you so much
    – cisko
    Nov 26 at 21:02
















Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
– José Carlos Santos
Nov 25 at 14:21




Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
– José Carlos Santos
Nov 25 at 14:21












I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
– cisko
Nov 25 at 15:11




I know, I am new to this and still practicing. The equations weren't coming the way I wanted them to.
– cisko
Nov 25 at 15:11












You can take a look at how I edited your question. That will help you learn MathJax for the next time.
– DisintegratingByParts
Nov 25 at 20:33




You can take a look at how I edited your question. That will help you learn MathJax for the next time.
– DisintegratingByParts
Nov 25 at 20:33












Thank you so much
– cisko
Nov 26 at 21:02




Thank you so much
– cisko
Nov 26 at 21:02















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