0

Is it true that the product of the two functions from $W_{2}^{1}(0,1)$ belongs to $W_{2}^{1}(0,1)$?

flag
2 
yes, because they are in $L^\infty$ with derivative in $L^2$, and $(uv)'=uv'+u'v$. – Pietro Majer Jun 14 at 10:45

closed as too localized by Pietro Majer, Deane Yang, Martin Brandenburg, Yemon Choi, Bill Johnson Jun 17 at 22:05

Browse other questions tagged or ask your own question.