Definition: In mathematics, a term that refers to an object or concept that is unchanging or irrevocably stable is called "unperturbed." In physics and engineering, it's often used in relation to the properties of materials that remain unchanged even under changes in external conditions. For example: - A material that remains perfectly solid (infinite resistivity) under any change in temperature. - An object that can be moved without losing its position or orientation. So, in summary, a term
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