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

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301 views

Spherical decreasing rearrangement on the sphere

On $\mathbb{R}^n$, we have the concept of spherically decreasing rearragement of a function, which means, given a function $f$, one can design a radial and decreasing function $f^*$ such that $\Vert f …
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