Top network posts

• 109 How to distinguish between walking on a sphere and walking on a torus?
• 80 what is expected from a PhD student?
• 44 Is $\mathbf{Q}(\sqrt{2}, \sqrt{3}) = \mathbf{Q}(\sqrt{2}+\sqrt{3})$?
• 38 Prove that $\gcd(M, N)\times \mbox{lcm}(M, N) = M \times N$.
• 37 How to explain that division by $0$ yields infinity to a 2nd grader
• 35 How do I calculate the intersection(s) of a straight line and a circle?
• 26 Pushforward of a vector field
• View more network posts →