# Eigenfunctions. help

1. Mar 18, 2012

### chappyform

eigenfunctions. help!!

I would be very grateful for any help on the following question:

Find any single eigenvalue-eigenfunction pair, with a real eigenvalue, for the
following operator:

$\textit{L}$ = ($\partial^2$/$\partial$x) + ($\partial$/$\partial$x) + 2Id

subject to the initial boundary conditions u(0)=u(pi)=0

2. Mar 19, 2012

### tiny-tim

welcome to pf!

hi chappyform! welcome to pf!

show us what you've tried, and where you're stuck, and then we'll know how to help!

3. Mar 19, 2012

### HallsofIvy

Staff Emeritus
Re: eigenfunctions. help!!

Since the derivatives are only with respect to x, you don't really need the partial derivatives.

4. Mar 21, 2012

### X89codered89X

Re: eigenfunctions. help!!

what is 2Id?

5. Mar 22, 2012

### tiny-tim

twice the identity!