Ricky Bobby
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 Dec 29 answered Showing that $\prod\limits_{i=0}^{n} {n \choose i}\leq(\frac{2^n-2}{n-1})^{n-1}$ Oct 28 comment Truth and undecidability @AsafKaragila, that's a surprising coincidence, I was discussing with a friend about this question (truth and indecidability) just half an hour ago, and your comment is pretty much the answer we were looking for ! Thx a lot Asaf. Oct 28 revised Truth and undecidability deleted 5 characters in body Oct 11 accepted Truth and undecidability Oct 10 comment Truth and undecidability @LostInMath yes,thx, I answered your comment before looking at Levon's answer. but Levon's answer perfectly answered my question Oct 10 comment Truth and undecidability okay thx a lot, I am going to have a look at it Oct 10 comment Truth and undecidability Thx, I guess this is a good start, but can you define a little bit more wath you mean by structure ? Oct 10 comment Truth and undecidability @LostInMath I'm saying that S can be true but not provable, so I am not talking aboout truth in term of logical consequence of T. For example when I say that all even number > 2 can be written as the sum of 2 prime numbers, It might be true (if I test every single even number) but It might be not provable (If there is no proof and the only way is to test every odd number and testing an infinit number of values isn't a proof). So how would you express this kind of truth ? Oct 10 asked Truth and undecidability Aug 25 accepted Question on permutation Aug 24 asked Question on permutation Aug 24 comment Composition of permutation to generate all permutations Thanks I created a new question, you might want to migrate your answer there ? Aug 24 revised Composition of permutation to generate all permutations deleted 1296 characters in body Aug 24 accepted Composition of permutation to generate all permutations Aug 24 comment Composition of permutation to generate all permutations thanks a lot for your answer, the question is a little bit different, I clarified it. Aug 24 comment Composition of permutation to generate all permutations thanks a lot for your answer, the question is a little bit different, I clarified it. Aug 24 revised Composition of permutation to generate all permutations added 1404 characters in body Aug 24 asked Composition of permutation to generate all permutations Aug 19 awarded Nice Question Aug 19 accepted Are some real numbers “uncomputable”?