Sturm Liouville Form: Solving y''+(2/x)y'+[landa]y=0 Equation

  • Thread starter Thread starter wolfandraven
  • Start date Start date
  • Tags Tags
    Form
wolfandraven
Messages
2
Reaction score
0

Homework Statement



y''+(2/x)y'+[landa]y=0, 0<x<1. y(0) must be finite, and y(1) = 0

Put this equation into sturm liouville form and state the weight function w(x)

Homework Equations



Sturm Liouville Form: {-d/dx(p(x)d/dx)+q(x)}y(x)=[landa]w(x)y(x)

The Attempt at a Solution



I'm almost certain the solution is {-d/dx(x^2dy/dx)=[landa]x^2y(x) so that w(x)=x^2

I just wanted to check that was correct because it comes right at the start of a computer project so it would be very annoying to find out I'd got that part wrong!

Thanks!

Gillian
 
Physics news on Phys.org
wolfandraven said:

Homework Statement



y''+(2/x)y'+[landa]y=0, 0<x<1. y(0) must be finite, and y(1) = 0

Put this equation into sturm liouville form and state the weight function w(x)

Homework Equations



Sturm Liouville Form: {-d/dx(p(x)d/dx)+q(x)}y(x)=[landa]w(x)y(x

The Attempt at a Solution



I'm almost certain the solution is {-d/dx(x^2dy/dx)=[landa]x^2y(x) so that w(x)=x^2

I just wanted to check that was correct because it comes right at the start of a computer project so it would be very annoying to find out I'd got that part wrong!

Thanks!

Gillian
Yes, that is correct.

 
Great, thanks!
 
Prove $$\int\limits_0^{\sqrt2/4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx = \frac{\pi^2}{8}.$$ Let $$I = \int\limits_0^{\sqrt 2 / 4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx. \tag{1}$$ The representation integral of ##\arcsin## is $$\arcsin u = \int\limits_{0}^{1} \frac{\mathrm dt}{\sqrt{1-t^2}}, \qquad 0 \leqslant u \leqslant 1.$$ Plugging identity above into ##(1)## with ##u...
Back
Top