Bessel function
noun
Bes·sel function
| \ ˈbe-səl-
\
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Definition of Bessel function
: one of a class of transcendental functions expressible as infinite series and occurring in the solution of the differential equation {latex}x^{2}\frac{d^{2}y}{dx^{2}} + x\frac{dy}{dx} = (n^2 - x^2)y{/latex}
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