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  "body": "\n## Summary\n\nA Cauchy–Euler equation is a linear equation $\\sum_k a_k x^k y^{(k)} = 0$ with constant $a_k$, in which the $k$-th derivative has the factor $x^k$.\nIt has solutions of the form $x^m$, and the change of variable $x = e^t$ gives constant coefficients. See the [[definition|0WDNRBXX7K]].\n",
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