More Complex Analysis-Removable Singularity

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SUMMARY

The discussion focuses on proving that if a function f is analytic in the region defined by (z:0<|z-a| 0. The key insight is to utilize the logarithm of the function, Log[f(z)], to analyze the behavior of f near the singularity.

PREREQUISITES
  • Understanding of complex analysis concepts, specifically removable singularities.
  • Familiarity with analytic functions and their properties.
  • Knowledge of the logarithm of complex functions.
  • Basic skills in limit evaluation and neighborhood definitions in complex analysis.
NEXT STEPS
  • Study the properties of removable singularities in complex analysis.
  • Learn about the logarithm of complex functions and its implications.
  • Explore examples of analytic functions with removable singularities.
  • Investigate the concept of neighborhoods in the context of complex functions.
USEFUL FOR

Students and researchers in mathematics, particularly those focusing on complex analysis, as well as educators looking for examples of removable singularities in analytic functions.

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Homework Statement


Let f be analytic in the region [tex](z:0<|z-a|<r)[/tex] and isn't defined at [tex]z=a[/tex].
Prove that if there is a neighborhood of z=a where [tex]Re f(z)>0[/tex] then z=a is a removable singularity of f.


Hope you'll be able to help me
Thanks in advance

Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
Hint: Consider Log[f(z)].
 
thanks!
 

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