Undeleted
I am requesting to reopen "Bounding with exponential Markov inequality".
The asker posted a question and showed the work that they had done so far. They explained where they got stuck (can't show $at-\phi(t)$ is positive), and their unsuccessful attempts (Taylor expansion). I explained why they were attempting to prove the wrong thing ($at-\phi(t)$ need not be positive, but rather they should show that $\sup_t (at - \phi(t))$ is positive) and provided a path to show this, along with some context.
The asker deleted their question after I posted my answer. Could the question be reopened? I think my answer could be useful to others.
