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  "body": "\n## Summary\n\nThe Fréchet derivative of a map $f$ between normed vector spaces at a point $x$ is a bounded linear map. It best approximates $f(x + h) - f(x)$ for small $h$.\nIt extends the derivative of one-variable calculus to maps between normed spaces, which can have infinite dimension.\nFor maps between Euclidean spaces it is the [[total derivative|0FNKFT8H6E]].\n",
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