Английская Википедия:Cauchy–Euler operator
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In mathematics a Cauchy–Euler operator is a differential operator of the form <math>p(x)\cdot{d \over dx}</math>[1] for a polynomial p. It is named after Augustin-Louis Cauchy and Leonhard Euler. The simplest example is that in which p(x) = x, which has eigenvalues n = 0, 1, 2, 3, ... and corresponding eigenfunctions xn.
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