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- Inclusion of $l^p$ space for sequences 2 answers
find all pairs $p,q\in [1,\infty)$ such that $id: l_p\to l_q$ is bounded.
This just means I must find all $(p,q)$ such that $\|x\|_q \le C\|x\|_p$ for some $C$ dependent on $p$, $q$. I don't know where to start, it seems like I'm missing something obvious