Hi, I want to plot all points (x,y,z) with the properties: z = x*y x = sqrt(9-y^2) How can I do this? Thanks.

Hi, I want to plot a set of complex numbers which have the property: |z-1|/|z+1| < 2

I should get a circle but plot() only uses real numbers.

How do I? ;)

Hi, I'm rather new to Maple but I have to find a composite number n which has the property that all her coprimes a fulfill the expression "a^(n-1) - 1 mod n = 0". I already found out that such numbers are called Carmichael numbers. But of course I need to use Maple and the information I was given by our professor. My problem is that I have no idea how to check if "a^(n-1) - 1 mod n = 0" is true for all coprimes of a given n. How do I? ;) btw. I don't know if I used the correct vocabulary here, so please forgive me if I expressed something wrong.