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6h
revised Investigating Nicolas' criterion for the Riemann Hypothesis.
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10h
comment Investigating Nicolas' criterion for the Riemann Hypothesis.
Yes, several; I put a CW answer that addresses the inequality quoted from Hardy and Wright, in an earlier question by the same OP.
10h
revised Investigating Nicolas' criterion for the Riemann Hypothesis.
added 376 characters in body
10h
comment Investigating Nicolas' criterion for the Riemann Hypothesis.
quid, the OP misunderstands the contents of the paper by Sole, Choie, et al.
10h
answered Investigating Nicolas' criterion for the Riemann Hypothesis.
11h
comment For any three integers $n$, $x<n$, and $y<n$, minimize the integer $xy-n>0$
If $n$ is odd, $n+1 = 2 \cdot \frac{n+1}{2}.$ If $n$ is even and $n+1$ is prime, you need to go to $n+2 = 2 \cdot \frac{n+2}{2}.$ If $n$ is even and $n+1$ is composite, there is some product $xy = n+1$ with both $x,y>1.$
11h
revised Find the greatest common divisor of pairs of polynomials
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11h
answered Find the greatest common divisor of pairs of polynomials
13h
comment How to find quadratic residues in the polynomial ring $k[t]$?
Basic Quadratic Forms by Larry Gerstein, bookstore.ams.org/gsm-90
1d
comment Determine all $k$ such that $k^3+k+1$ is divisible by 11
You could write $k = 11t + r,$ with the understanding that $r$ is an integer with $0 \leq r \leq 10.$ Then you just check each such $r.$
1d
comment Formulate quadratic equation
$r=1$ is a root. Which means that you can divide your cubic by $(r-1)$ and get a quadratic, which may have other roots
1d
revised Simple proof of showing the Harmonic number $H_n = \Theta (\log n)$
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1d
revised Simple proof of showing the Harmonic number $H_n = \Theta (\log n)$
added 204 characters in body
1d
revised Simple proof of showing the Harmonic number $H_n = \Theta (\log n)$
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1d
revised Simple proof of showing the Harmonic number $H_n = \Theta (\log n)$
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1d
awarded  Enlightened
1d
awarded  Nice Answer
2d
comment Rulings of One Sheet Hyperboloid
Ted, do you know a traditional source for this parametrization? I cannot seem to get it as stereographic projection around one of its points. This relates to a continuing interest in an 1897 book by Fricke and Klein, which may or may not include this. Oh, a later English book with selections discussed is Noneuclidean Tessellations and their Groups by Wilhelm Magnus
Feb
10
answered Fraction walk through
Feb
10
comment For what values of $a, n$ the number $2^a\cdot 3^n+1$ is prime?
en.wikipedia.org/wiki/Pierpont_prime