I think the overhead from our images is adding up. We have a lot of custom PHP/javascript code now so when you put all of that together it slows down...
Suppose that $k$ is a positive integer less than $n_0$. The distance between consecutive rational numbers with denominator $k$ is $1/k$. So there at...
The circle is the one given in the question, the circle of radius 2 centred at the origin. So you want the right-hand half of that circle. The region...