# user1131467

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bio website location Zurich, Switzerland age member for 1 year, 4 months seen May 17 at 14:09 profile views 97

# 210 Actions

 Aug2 comment Efficiently evaluating the Motzkin numbers@AsafKaragila: sorry typo Aug2 comment A closed form for $T_N = 1 + \sum\limits_{k=0}^{N-2}{(N-1-k)T_k}$?I made a mistake sorry: See here: math.stackexchange.com/questions/177856/… Aug2 asked Efficiently evaluating the Motzkin numbers Aug2 accepted A closed form for $T_N = 1 + \sum\limits_{k=0}^{N-2}{(N-1-k)T_k}$? Aug2 asked A closed form for $T_N = 1 + \sum\limits_{k=0}^{N-2}{(N-1-k)T_k}$? Jul30 accepted Probabilistic Sieve of Eratosthenes Jul30 accepted P[random x is composite | $2^{x-1}$ mod $x = 1$ ]? Jul30 revised How many elements $a \in \Bbb{Z}_N$ such that $ax \equiv y \mod N$deleted 8 characters in body Jul29 comment How many elements $a \in \Bbb{Z}_N$ such that $ax \equiv y \mod N$Once one solution is known how do I find the others? Jul29 asked How many elements $a \in \Bbb{Z}_N$ such that $ax \equiv y \mod N$ Jul27 revised P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?deleted 70 characters in body Jul27 comment P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?@ErickWong: Whether you can round a small number to zero depends on the application. Jul27 comment P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?@ErickWong: In what way are the calculations not correct without the typo ? Jul27 comment P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?I have fixed the typo and recalculated. I now get between 3.29e-306 < P_Q < 2.63e-44, is this correct now? Jul27 revised P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?deleted 4 characters in body Jul27 comment P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?If my calculations are correct than your answer is useless. The probability has been narrowed down between ~0.0 and 0.9. Jul27 revised P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?added 28 characters in body Jul27 comment P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?I've added calculations of your PouletNumber forumlae above. Can you please verify I have calculated the two bounds correctly? Jul27 revised P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?added 105 characters in body Jul26 revised P[random x is composite | $2^{x-1}$ mod $x = 1$ ]?added 420 characters in body