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 Feb6 awarded Revival Feb5 comment Big O notation - Proving that a function is not O(n) Quote: "I'm not looking for someone to give me a full answer, I just need some pointers on how to go about starting..." Feb5 comment Cardinality of a finite algebra Hint: Every finite algebra is generated by a partition. Feb5 revised Measure Theory and Law of Large numbers added 11 characters in body Feb5 revised Time Complexity in $\theta$ Notation added 148 characters in body Feb5 comment Time Complexity in $\theta$ Notation Please use \Theta. Feb5 answered Time Complexity in $\theta$ Notation Feb5 comment Convexity of Binomial Term @Henry Concavity with respect to n is out of the question, by inspection for y=6 or by comparison with a normal density when y is large. Feb5 comment Prove that $\left(\frac12(x+y)\right)^2 \le \frac12(x^2 + y^2)$ Compute the RHS minus the LHS, this is a perfect square. Feb5 answered Measure Theory and Law of Large numbers Feb5 revised Expectation of a non-negative random variable edited body Feb5 comment Densitiy of Sum of Exponetial RVs (Basic) @V.Rossetto Even knowing several ways to do this computation, I frankly do not understand your hint. Feb5 answered Densitiy of Sum of Exponetial RVs (Basic) Feb5 comment Total number of nodes in critical Galton-Watson process Did you check the literature, for example the book by Lyons and Peres? This is a classical result. Feb5 answered What is $\lim_{k\to\infty}\frac{A_k}{\sum_{i=1}^k A_i}$? Feb5 revised Can someone please show me how to answer this question? edited tags Feb5 comment Given the sum of two exponential random variables, what is the conditional distribution of one of them? This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level. Feb5 comment Given the sum of two exponential random variables, what is the conditional distribution of one of them? Unfortunately the ratio is 0/0. @upvoter Why the upvote? Feb5 comment Transformation of a uniform distribution in order to get a random variable distributed like Y. Sorry but you are not answering my query for clarification and I have no idea about the real nature of your problem. Feb5 awarded Nice Answer