Can someone give me the definition of a perturbation vector? I know that it is a vector composed of $x_i$ that have a small value and are independent, but I know I can define it by using norms because my teacher told me this. My teacher doesn't answer my mails and I need this definition for tomorrow.
2026-03-25 09:37:08.1774431428
Definition of perturbation using norms
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