Mathematical Methods (10/24.539)
VIII. Special Functions
Example 8.2 -- Solution Using Bessel Function Methods
Problem Description:
Find the general solution to the following equation using the general form of Bessel's equation:
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Problem Solution:
By equating the coefficients of the y’(x) term with the most general form of Bessel’s equation [see eqns. (8.59) - (8.61)], we have
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Therefore, a = -3, b = 2, and p = 4.
With these constants specified, the coefficient for the y(x) term becomes
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Therefore, c = 3, d = -5, and q = 1.
Now, since the conditions of the method are satisfied, the constants within the general solution become


Finally, since d < 0, we have
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This represents an analytical solution to the given problem (a tough problem indeed). In a realistic BVP, one would now apply appropriate boundary conditions to uniquely identify the two arbitrary coefficients within the general solution.
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10/24.539 Lecture Notes by Dr. J. R. White, UMass-Lowell (updated October 1998).
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