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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”?