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Riku
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Is it true that the notiondefinition of approximate differentiability presented here of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \rlap{-}\!\!\int_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

Is it true that the notion of approximate differentiability of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \rlap{-}\!\!\int_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

Is it true that the definition of approximate differentiability presented here of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \rlap{-}\!\!\int_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

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Riku
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Is it true that the notion of approximate differentiability of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \dashint_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$$$\lim_{r \to 0} \rlap{-}\!\!\int_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

Is it true that the notion of approximate differentiability of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \dashint_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

Is it true that the notion of approximate differentiability of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \rlap{-}\!\!\int_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.

Source Link
Riku
  • 839
  • 6
  • 17

Equivalent notion of approximate differentiability

Is it true that the notion of approximate differentiability of a function $f: \mathbb{R}^N \to \mathbb{R}$ is equivalent to the following one?

$$\lim_{r \to 0} \dashint_{B_r(x)} \min \left\{\frac{f(y)-f(x) - L(y-x)}{|y-x|},1 \right\} dy = 0$$ for some linear $L:\mathbb{R}^N \to \mathbb{R}$.