
Differential Equations Ordinary and Partial Differential Equations Math Forum 
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February 23rd, 2017, 01:13 PM  #1 
Newbie Joined: Feb 2017 From: College Station Posts: 7 Thanks: 0  Solving for PDE Eigenvalues
Eigenvalue PDE? How can I solve for lambda of the new problem exactly how the old problem was solved. Both problems are included in the attached picture. Please show steps

February 23rd, 2017, 05:11 PM  #2 
Senior Member Joined: Sep 2015 From: Southern California, USA Posts: 1,500 Thanks: 757 
any chance you could upload a version of that image that doesn't require a microscope to see?

February 23rd, 2017, 07:47 PM  #3 
Newbie Joined: Feb 2017 From: College Station Posts: 7 Thanks: 0  Picture is in Zipfile
Don't know how to upload image any larger. Site has a limit. I placed it in the zipfile attached.

February 25th, 2017, 03:45 AM  #4 
Math Team Joined: Jan 2015 From: Alabama Posts: 2,731 Thanks: 707 
And opening THAT requires one to have Microsoft Office on your computer! Using a magnifying glass to read the first post, the first problem given is the boundary value problem with boundary conditions u(x, 0)= u(x, W)= 0, u(0, y)= u(L, y)= 0. The "suggest" first solving the eigenvalue problem . The question, then, is "why doesn't that same eigenvalue strategy work if the boundary value problem is with boundary conditions u(x, 0)= u(x, W)= 0, u(0, y)= u(L, y)= 0." 

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eigenvalues, pde, solving 
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