# Eigenfunctions and eigenvalues of Fourier Transform? :grumpy: I have a question..yesterday at Wikipedia i heard about the "Hermite Polynomials2 as Eigenfunctions of fourier (complex?) transform with Eigenvalues i^{n} and i^{-n}...could someone explain what it refers with that?...when it says "Eigenfunctions-values" it refers to the Kernel K(x,t) that is a complex exponential function?...

HallsofIvy
Homework Helper
In Linear Algebra, an "eigenvalue" and "eigenvector" of a linear transformation, L, are a number, $\lambda$, and vector, v, such that $Av= \lambda v$. We can think of the set of (integrable) functions as a vector space and the Fourier transform is a linear transformation on that set. The Hermite Polynomials have the property that the Fourier transform of the nth Hermite Polynomial, Hn, is
F(Hn)= inHn.

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mathman
Note to Halls of Ivy. You left out the eigenvalue in your definition equation.

HallsofIvy
Homework Helper
mathman said:
Note to Halls of Ivy. You left out the eigenvalue in your definition equation.
Thanks, I've edited it.

HallsofIvy