- #1
Bipolarity
- 776
- 2
Suppose I am to solve an nth order linear homogenous differential equation with constant coefficients. I set up the auxiliary equation, find its roots, and then each root gives me a solution of the form [itex]e^{rx}[/itex] to the ODE which is linearly independent from the others. But if there are repeated roots, I need to multiply that solution by x each time the root is repeated to obtain a fundamental set containing n elements that are linearly independent.
What assurances are there that the multiplication by x will yield a solution? And that this is linearly independent from all other solutions? Could anyone provide me an outline of the proof, or how I might prove it, or in what textbook I might find a proof?
I have not studied annihilator operators yet or algebra on polynomial differential operators, but might studying these topics perhaps make my task a bit easier?
Thanks!
BiP
What assurances are there that the multiplication by x will yield a solution? And that this is linearly independent from all other solutions? Could anyone provide me an outline of the proof, or how I might prove it, or in what textbook I might find a proof?
I have not studied annihilator operators yet or algebra on polynomial differential operators, but might studying these topics perhaps make my task a bit easier?
Thanks!
BiP