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Questions about geometric properties of sets using measure theoretic techniques; rectifiability of sets and measures, currents, Plateau problem, isoperimetric inequality and related topics.

12 votes
Accepted

If a function $f$ is $(1+\varepsilon)$-times Lebesgue differentiable everywhere, is $f$ a co...

I realise I'm bumping into you again and already gave you an answer elsewhere after you posted this, but I thought I'd post my answer here for others to see. The answer is yes, $f$ has to be constant …
Sam Forster's user avatar
6 votes
1 answer
313 views

Does approximately Fréchet differentiable imply approximately Gateaux differentiable?

In what follows, $\mu^n$ denotes $n$-dimensional Lebesgue measure, and $B_r(x)$ is the open ball with radius $r$ centered at $x$. In elementary calculus, if we have a function $f : \mathbb{R}^n \righ …
Sam Forster's user avatar