Particular Solution of Constant Coefficient Linear nth Order ODE
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Theorem
Consider the linear $n$th order ODE with constant coefficients:
- $(1): \quad \ds \sum_{k \mathop = 0}^n a_k \dfrac {\d^k y} {d x^k} = \map R x$
Let $(1)$ have the following $n$ initial conditions:
- $(2): \quad y = y_0, \dfrac {\d y} {\d x} = y_1, \dotsc, \dfrac {\d^{n - 1} y} {\d x^{n - 1} } = y_{n - 1}$
when $x = x_0$.
Then there exists exactly one particular solution of $(1)$ which satisfies $(2)$.
Proof
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Sources
- 1958: G.E.H. Reuter: Elementary Differential Equations & Operators ... (previous) ... (next): Chapter $1$: Linear Differential Equations with Constant Coefficients: $\S 3$. Equations of higher order and systems of first order equations: $\S 3.3$ Arbitrary constants and initial conditions