Verifying Entireness of Analytic Functions Using Cauchy-Riemann Theory

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SUMMARY

The discussion focuses on verifying the entireness of the analytic function f(z) = 3x + y + i(3y - x) using Cauchy-Riemann theory. The participants confirm that the function satisfies the Cauchy-Riemann equations: u_x = v_y = 3 and u_y = -v_x = 1. Since the function is analytic at every point in the complex plane, it is concluded that f(z) is entire. The only potential issue discussed is the presence of removable singularities, which is clarified as non-existent in this case.

PREREQUISITES
  • Understanding of Cauchy-Riemann equations
  • Familiarity with complex functions and their properties
  • Knowledge of analytic functions and their characteristics
  • Basic skills in complex variable calculus
NEXT STEPS
  • Study the implications of the Cauchy-Riemann equations in complex analysis
  • Explore the concept of removable singularities in complex functions
  • Learn about the classification of singularities in complex analysis
  • Investigate other examples of entire functions and their properties
USEFUL FOR

Students of complex analysis, mathematicians focusing on analytic functions, and educators teaching Cauchy-Riemann theory will benefit from this discussion.

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Homework Statement


Apply rules of Cauchy-riemann theory to verify that each of these functions is entire:

f(z)=3*x+y+i(3y-x)



Homework Equations



u_x=v_y, u_y=-v_x

The Attempt at a Solution



u(x,y)=3x+y
v(x,y)=3y-x

u_x=3
v_y=3
u_y=1
-v_y=1
I know that a function is analytic at each point, then the function is entire. How would I show that the function is analytic at each pt.?
 
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You've shown it satisfies CR everywhere. The only thing that could prevent it from being entire is if it has a removable singularity someplace. Does it? Does it have ANY singularities?
 

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