Problem:
"Let x_1, ..., x_n be i.i.d random variables uniformly on [0,1]. Let X be the length of the longest increasing subsequence of x_1, ..., x_n. Show that E[X] \ge (1-o(1))(1-e^{-1}) \sqrt{n}."
Hi forum!
Using the Erdos' lemma I can only deduce that E[X] \ge \frac{1}{2} \sqrt{n}...