Hans Parshall
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 Nov 15 awarded Yearling Jul 28 awarded Good Answer Jun 8 awarded Popular Question Nov 17 awarded Famous Question Nov 15 awarded Yearling Sep 30 awarded Explainer Aug 29 awarded Nice Answer Jul 2 awarded Curious Mar 24 awarded Nice Answer Nov 21 comment Natural density of primes congruent to m modulo N and to r modulo S That should only be true if you expect that being relatively prime to $N$ and relatively prime to $S$ are essentially independent events. What condition on $N$ and $S$ do you need to make this a reasonable expectation? Nov 15 awarded Yearling Oct 4 accepted Rowspan of 0-1 Matrix Oct 4 comment Rowspan of 0-1 Matrix This seems to settle that the answer is no, thanks. Oct 3 comment Rowspan of 0-1 Matrix Sure, good point. I wasn't considering the trivial case. Oct 3 asked Rowspan of 0-1 Matrix Sep 26 comment Is $\frac{a+b}{c+d}<\frac{a}{c}+\frac{b}{d}?$, for $a,b,c,d>0$? Or a = b = c = d = 1... Sep 12 awarded Favorite Question Jul 8 awarded Nice Answer Feb 1 awarded Notable Question Nov 15 awarded Yearling