Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
It is known that $C^\infty$ function space dense in Sobolev space. But I want to know that is this statement true also for $C^k$ function space?
The space of $C^k$ functions is even bigger than $C^\infty$ functions. Hence, it remains to be dense.
Required, but never shown
26 days ago
25 days ago