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I have recently come across the Helmholtz differential equation.

Is there already a thread here that discusses the mathematic techniques (differential equation techniques) used to solve it?

If not can we discuss how one can solve the equation?

I'm familiar but rusty with linear differential equations with one variable and Laplace transforms but I've been out of school for some time.

I'm wanting the steps used to solve this equation. I do recall from school - things like solving for the roots of the auxillary equation and based upon the roots build the exponential solution - (again from a rusty memory)

Curious (and thanks)

-Sparky_

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# Helmholtz differential equation

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