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$\phi$ is a linear fractional transformation such that $\phi(0) = 0, \phi(1) = 1$, and $\phi(2) = \infty$.

$\phi$ is a linear fractional transformation such that $\phi(0) = 0, \phi(1) = 1$, $\phi(2) = 2$, and $\phi(3) = \infty$.

I found this in a past final exam, so I don't have an answer for it.

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    thanks! but what about the fact that it's at $\infty$?2011-05-12
  • 0
    http://en.wikipedia.org/wiki/Riemann_sphere2011-05-12

2 Answers 2