c*w
发帖数: 4736 | 1 First, the probability that they are on one semisphere is 1-prob(not
on
one semisphere). Now I'll study the prob that they are NOT on one
semisphere. However, the first n are always on one semisphere, then
if the last one make them NOT in one semisphere, then its "Fan3 Xiang4
Yan2 Chang2 Xian4 will be within the wierd part that "cut" by those
planes that are formed by (n-1) points and the center, all together
there
are n such planes, and cut the whole ball into a small Jiao3. So as
far
as the ar |
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