Analyzing Singularities at z=2 & -1/3

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SUMMARY

The discussion focuses on analyzing the singularities at z=2 and z=-1/3 using Laurent series. The primary method suggested involves reviewing the definition of a pole of order n rather than expanding the series. The participant expresses a desire to understand both the Laurent expansion technique and the pole order definition to confirm their findings. The conclusion emphasizes that while the Laurent series can be informative, it is not necessary for determining the nature of these singularities.

PREREQUISITES
  • Understanding of complex analysis concepts, specifically singularities and poles.
  • Familiarity with Laurent series and their applications in analyzing functions.
  • Knowledge of the definition and properties of poles of order n.
  • Basic skills in manipulating mathematical expressions and series expansions.
NEXT STEPS
  • Review the definition of poles and their orders in complex analysis.
  • Study the process of deriving Laurent series for various functions.
  • Practice identifying singularities in complex functions through examples.
  • Explore the relationship between Laurent series and residue calculations.
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Students and professionals in mathematics, particularly those studying complex analysis, as well as educators looking to clarify concepts related to singularities and series expansions.

AlBell
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Homework Statement



I have been asked to state the precise nature of the singularities at z=2 and z=-1/3 in
t6rtb6.png


Homework Equations



I know the laurent series is given by
vymfz4.png


The Attempt at a Solution



I think I need to expand the series out into a laurent series around z=2 and z=-1/3 but I am really stuck on how to do this and would really appreciate a bit of help! From some examples I have seen I need to manipulate the denominator into a known series and then expand this but I am unsure of how to do that. Thanks
 
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You don't need to expand anything. You just need to review the definition of a pole of order n.
 
I know I don't have to but I thought that a laurent expansion was another way to find out the nature of a singularity, like what the order of the pole was, and I just wanted to try and get a grasp of this technique as well and get the same answer for both techniques
 

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