Approximate closed-form formulas for the zeros of the Bessel Polynomials

Details Approximate closed-form formulas for the zeros of the Bessel Polynomials Approximate closed-form formulas for the zeros of the Bessel Polynomials

2011-05-04

arxiv.org/abs/1105.0957v1

Physics

Mathematical Physics

9 pages, 2 figures

Scientific paper

We find approximate expressions x(k,n) and y(k,n) for the real and imaginary parts of the kth zero z_k=x_k+i y_k of the Bessel polynomial y_n(x). To obtain these closed-form formulas we use the fact that the points of well-defined curves in the complex plane are limit points of the zeros of the normalized Bessel polynomials. Thus, these zeros are first computed numerically through an implementation of the electrostatic interpretation formulas and then, a fit to the real and imaginary parts as functions of k and n is obtained. It is shown that the resulting complex number x(k,n)+i y(k,n) is O(1/n^2)-convergent to z_k for fixed k

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