Frobenius power series repeated roots

Click For Summary
SUMMARY

The discussion focuses on the Frobenius method for solving differential equations with repeated roots, specifically addressing the solution form for the second solution, y2, when the indicial root is a double root. The equation discussed is the Euler-Cauchy equation, represented as x^2y'' + αxy' + βy = 0, with the context of a regular singular point at x=0. The solution for y2 is given as y2 = y1ln(x) + x^s Σ C_n x^n, where y1 is the first solution and C_n are coefficients derived from the series expansion.

PREREQUISITES
  • Understanding of the Frobenius method for solving differential equations
  • Familiarity with the Euler-Cauchy equation and its properties
  • Knowledge of series solutions and indicial roots
  • Basic concepts of regular singular points in differential equations
NEXT STEPS
  • Study the derivation of the Frobenius method for different types of singular points
  • Explore the implications of repeated roots in the context of differential equations
  • Learn about the calculation of coefficients C_n in series solutions
  • Investigate applications of the Euler-Cauchy equation in mathematical physics
USEFUL FOR

Mathematicians, physics students, and anyone studying differential equations, particularly those interested in advanced methods for solving equations with repeated roots.

John777
Messages
26
Reaction score
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
 
Physics news on Phys.org
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.
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 5 ·
Replies
5
Views
16K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 1 ·
Replies
1
Views
6K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 8 ·
Replies
8
Views
4K
Replies
8
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K