Question

The Rayleigh functions are defined in terms of the zeroes of these functions. The 2-d Fourier transform of the unit disk equals two pi over the absolute value of k times one of these functions. These functions are multiplied by trigonometric exponentials in an infinite series in the Jacobi–Anger expansion. These functions result when applying the method of Frobenius to the equation ■END■

ANSWER: Bessel functions [or cylindrical harmonics; accept Bessel functions of the first, second, or third kind; prompt on Neumann functions until "Neumann" is read; prompt on Hankel functions until "Hankel" is read; prompt on harmonics]
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2024 ARGOS @ Chicago11/23/2024Y1100%100%0%67.00