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Questions about abstract measure and Lebesgue integral theory. Also concerns such properties as measurability of maps and sets.

0 votes
2 answers
77 views

"Kind of Duality result" for the volume of a $d$-ball

I want to prove the following "duality" and don't know how to get started... Does it have anything to with covering theorems? $\limsup_{r\rightarrow0} \sup_{y \in B_r (x)} V^{-1} \int_{B_r (y)}f \mat …
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  • 141
4 votes
0 answers
354 views

Lipschitz kernel

We consider the following probability measure on $\mathbb{R}^2$: $\mu = Leb\vert_{[0,1]} \times \delta_0$. Furthermore the following dilation, say $d$, is defined as $(x,0) \mapsto \frac{1}{2}(\delta_ …
tubmaster's user avatar
  • 141