Finding Isomorphisms from D to R

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SUMMARY

This discussion focuses on finding isomorphisms between specific domains and ranges in complex analysis. The cases presented include: 1) D defined as the open unit disk and R as the annulus between radii 1 and 2; 2) D as a sector in the complex plane with modulus greater than 2 and R as a specific quadrant; 3) D as a region excluding a line segment and R as the upper half of the unit disk. The participants seek guidance on how to approach these transformations using complex mappings.

PREREQUISITES
  • Understanding of complex analysis concepts, particularly isomorphisms.
  • Familiarity with the properties of complex numbers and their geometric interpretations.
  • Knowledge of conformal mappings and their applications in transforming regions in the complex plane.
  • Proficiency in using LaTeX for mathematical expressions.
NEXT STEPS
  • Study the Riemann Mapping Theorem for insights on conformal mappings between simply connected domains.
  • Explore techniques for finding conformal maps, such as the use of Möbius transformations.
  • Learn about the geometric interpretation of complex functions and their effects on regions in the complex plane.
  • Practice writing LaTeX for mathematical notation to improve clarity in problem statements.
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Students and educators in mathematics, particularly those studying complex analysis, as well as anyone involved in advanced mathematical problem-solving and transformations in the complex plane.

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Homework Statement


I need to find isomorphisms from D to R in the next cases:

1. D=(z: 0<|z|<1)$ , $ R=(z:1<|z|<2)
2. D= (z: \frac{3 \pi}{4} <argz< \pi , |z|>2 )$ , $R= (z:Rez<0,0<Imz< \pi)
3. D=(z:0<Imz<2)-(z:z=x+i:x \leq -1) $ , $R= (z: |z|<1 , Imz>0).

Homework Equations



The Attempt at a Solution



I've no idea about these three cases...
Hope you'll be able to help me!

Tnx
 
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