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Bessel function

Modified Bessel function

Modified Bessel function of the second kind

For real $x>0$ and $\nu$, one useful representation is
$$
K_\nu(x)=\frac12\int_{-\infty}^{\infty}e^{-x\cosh t+\nu t}\,dt.
$$
It turns large-order asymptotics into a <Laplace integral> with a moving maximum.

Integral representation of the modified Bessel function of the second kind

Completed nonholomorphic Eisenstein series

Fourier transform of the modified Bessel function K0

Large-order asymptotic of the modified Bessel function of the second kind

Past exam of the mathematics course of the University of Cambridge / 2002 / iii / Paper 26 / 6 / Solution

Past exam of the mathematics course of the University of Cambridge / 2004 / iii / Paper 76 / 1 / b / iv / Solution

Past exam of the mathematics course of the University of Cambridge / 2018 / ii / Paper 3 / 31B / b / Solution

Integral representation of the modified Bessel function of the second kind

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Integral representation of the modified Bessel function of the second kind

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