John Smith
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 Feb 6 awarded Curious Feb 5 asked Probability of going from a set $S$ to its complement on a Markov chain Dec 8 awarded Tumbleweed May 22 comment Proving combinatoric identity using the inclusion-exclusion principle Thanks a lot! :) May 22 accepted Proving combinatoric identity using the inclusion-exclusion principle May 22 asked Proving combinatoric identity using the inclusion-exclusion principle May 22 accepted Using sum of logarithms of primes to prove the number of primes up to $n$ is $O(n/\log n)$ Mar 24 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. Mar 24 asked Using sum of logarithms of primes to prove the number of primes up to $n$ is $O(n/\log n)$ Dec 30 awarded Supporter Dec 30 comment Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Thanks a lot :) Dec 30 accepted Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Dec 30 asked Sum of consecutive sub-sequence of 100 natural numbers divides 100 (equals 0 mod 100) Dec 14 asked Is the validity of the Skolemization of a sentence A infers the validity of A? Sep 17 awarded Student Sep 17 awarded Scholar Sep 17 accepted Intersection between a function and its derivative Sep 17 comment Intersection between a function and its derivative Thanks a lot :) Sep 17 asked Intersection between a function and its derivative