Frobenius power series repeated roots

In summary, a Frobenius power series is a method used to solve differential equations with repeated roots. This method involves assuming a solution in the form of a power series and solving for the coefficients. It is named after mathematician Ferdinand Georg Frobenius and is helpful for finding solutions when traditional methods fail. However, the convergence radius and limitations should also be considered when using this method.
  • #1
John777
27
1
Could someone please explain the y2 solution for repeated roots in Frobenius method where y2=y1lnx+xs [tex]\Sigma[/tex] CnxnI am struggling to figure out how to solve this
 
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  • #2
For a solution about a regular singular point x=0, look at simplest case first in the form of Euler-Cauchy equation
[tex]x^2y''+\alpha xy'+\beta y=0 [/tex]

when the indicial root is a double root.
 

1. What is a Frobenius power series?

A Frobenius power series is a type of power series that is used to solve differential equations with repeated roots. It is named after the mathematician Ferdinand Georg Frobenius and is also known as the Frobenius method.

2. What are repeated roots in a differential equation?

Repeated roots in a differential equation occur when the characteristic equation has multiple roots of the same value. This can make it difficult to find a general solution using traditional methods, but the Frobenius power series method can be used to solve for a solution in this case.

3. How is the Frobenius power series method used to solve for solutions with repeated roots?

The Frobenius power series method involves assuming a solution in the form of a power series, plugging it into the differential equation, and solving for the coefficients. This method is particularly useful when the roots of the characteristic equation are not distinct.

4. What is the convergence radius of a Frobenius power series?

The convergence radius of a Frobenius power series depends on the coefficients of the series and the roots of the characteristic equation. In some cases, the series will only converge for a certain range of values, while in other cases it may converge for all values.

5. Are there any limitations to the Frobenius power series method?

While the Frobenius power series method is a powerful tool for solving differential equations with repeated roots, it does have limitations. It may not work for all types of differential equations, and in some cases, it may provide a solution that is not valid for all values of the variable.

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