Hint: The equation x2+y2+z2=1 is the equation of the sphere in R3 of radius 1 centred at the origin. The condition z≥0 gives you the upper hemisphere, ... ... <看更多>

Divergence Theorem. 0.1 Intuition Behind Stokes' Theorem. Imagine you're at a party in a huge mansion and want to see how many people are ... ... <看更多>