Skip to main content
2 events
when toggle format what by license comment
Mar 23, 2018 at 18:37 comment added Piotr Hajlasz Exercise 2.4.5 in the book by Ambrosio and Tilli has a hint so you might want to look into that book if you are interested how to prove it.
Feb 13, 2017 at 12:06 history answered rozu CC BY-SA 3.0