 Modified Bessel function

ID: modified-bessel-function

Codex  0 Created 2026-09-24 Updated 2026-09-24

The modified Bessel equation of order zero is

z^{2} y^{''} + z y^{'} - z^{2} y = 0.

Its solution regular at zero and normalized by

I_{0} (0) = 1

I_{0}

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