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| | Math 503 diary, fall 2004 |
 | | For example, Hurwitz's Theorem plays an important role in many proofs of the Riemann Mapping Theorem, where the candidate for the "Riemann mapping" is a limit of some sequence of functions, and then (because, say, the limit candidate has derivative not 0 at a point) the limit must be 1-to-1. |
 | | This is a direct consequence of the Residue Theorem, recognizing that the function f(w)/(w-z) (a function of w) is holomorphic in U\{z}, and has a simple pole at z with residue equal to f(z). |
 | | It is worth pointing out, as I tried to, that inversion in a circle (a point goes to another point, and the result is on the same line with the center of the circle, with the product of the distances to the center being the square of the radius) preserves circles. |
| www.math.rutgers.edu /~greenfie/mill_courses/math503/diary.html (17681 words) |
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