Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
@Nate Eldredge I have edited the post. It was not clearly written, I wanted it to mean that the constant is dependent on $t$. The estimates that you mention are not of IMMEDIATE interest to me, but I would love to know about them as well. I will really appreciate some references on them.
