Regular singular points of 2nd order ODE

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SUMMARY

The discussion centers on solving second-order ordinary differential equations (ODEs) with regular singular points at z=a and z=b. The general form of the function q is established as q(z)=g(z)/((z-a)²(z-b)²), where g(z) is analytic everywhere. Additionally, the function p is defined as p(z)=f(z)/((z-a)(z-b)), with f(z) needing to be determined through linearity conditions. The participants emphasize the importance of correctly identifying the coefficients of the ODE terms for accurate solutions.

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  • Understanding of second-order ordinary differential equations (ODEs)
  • Familiarity with regular singular points in differential equations
  • Knowledge of analytic functions and their properties
  • Experience with linearity conditions in mathematical functions
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  • Study the method of Frobenius for solving ODEs with singular points
  • Learn about the properties of analytic functions and their applications
  • Research linearity conditions in the context of differential equations
  • Explore specific examples of second-order ODEs with regular singular points
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Mathematicians, physics students, and engineers dealing with differential equations, particularly those focusing on the analysis and solutions of second-order ODEs with singular points.

Jerbearrrrrr
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Homework Statement


[PLAIN]http://img265.imageshack.us/img265/6778/complex.png

I did the coefficient of the w' term. What about the w term?

This seems like a fairly standard thing, but I can't seem to find it anywhere.
What ansatz should I use for q, if the eqn is written w''+pw'+qw?
C/(z-a)²+ D/(z-b)²?
Any conditions, except for the one generated by z->1/t substitution?
Or should I use C+cz on the top, etc?
 
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Jerbearrrrrr said:

Homework Statement


[PLAIN]http://img265.imageshack.us/img265/6778/complex.png

I did the coefficient of the w' term. What about the w term?

This seems like a fairly standard thing, but I can't seem to find it anywhere.
What ansatz should I use for q, if the eqn is written w''+pw'+qw?
C/(z-a)²+ D/(z-b)²?
Any conditions, except for the one generated by z->1/t substitution?
Or should I use C+cz on the top, etc?

Well, if a 2nd order ODE has regular singular points at [itex]z=a[/itex] and [itex]z=b[/itex], then [itex]q[/itex] has poles up to 2nd order at those points, and the most general form of [itex]q[/itex] is then

[tex]q(x)=\frac{g(z)}{(z-a)^2(z-b)^2}[/tex]

where [itex]g(z)[/itex] is analytic everywhere. You should have used similar reasoning to find

[tex]p(z)=\frac{f(z)}{(z-a)(z-b)}[/itex]<br /> <br /> Then just apply the linearity condition to find [itex]f[/itex] and [itex]g[/itex].[/tex]
 
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