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Bessel function
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families of solutions to related differential equations
~40 min read
Encyclopedic overview
Bessel functions describe the radial part of vibrations of a circular membrane.
Bessel functions are a class of special functions that commonly appear in problems involving wave motion, heat conduction, and other physical phenomena with circular or cylindrical symmetry. They are named after the German astronomer and mathematician Friedrich Bessel, who studied them systematically in 1824.
Excerpted from Wikipedia’s “Bessel function” article, available under the CC BY-SA 4.0 licence.