John Smith
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 Feb6 asked Adding edges to an out-regular directed graph to make it in-regular Feb6 awarded Curious Feb5 asked Probability of going from a set $S$ to its complement on a Markov chain Dec8 awarded Tumbleweed Dec1 asked Calculating the distribution H, H(X) when H is chosen uniformly from a family of hash funcitions May22 comment Proving combinatoric identity using the inclusion-exclusion principle Thanks a lot! :) May22 accepted Proving combinatoric identity using the inclusion-exclusion principle May22 asked Proving combinatoric identity using the inclusion-exclusion principle May22 accepted Using sum of logarithms of primes to prove the number of primes up to $n$ is $O(n/\log n)$ Mar24 comment Using sum of logarithms of primes to prove the number of primes up to $n$ is $O(n/\log n)$ When I searched some through the net ive found many proofs, but none of them was elementary. The point in my question is to prove it using what I proved in the first exercise. I think it should be pretty elementary. If you have any hints on what I can do from here it will be very helpful. Mar24 asked Using sum of logarithms of primes to prove the number of primes up to $n$ is $O(n/\log n)$ Dec30 awarded Supporter Dec30 comment Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Thanks a lot :) Dec30 accepted Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Dec30 asked Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Dec14 asked Is the validity of the Skolemization of a sentence A infers the validity of A? Sep17 awarded Student Sep17 awarded Scholar Sep17 accepted Intersection between a function and its derivative Sep17 comment Intersection between a function and its derivative Thanks a lot :)