Let $I_1(z)$ be the Bessel function of the first order with purely imaginary argument.
Can we explicitly bound $I_1$ on $[0,x]$, where $x>0$ is a real number in terms of $x$?
Let $I_1(z)$ be the Bessel function of the first order with purely imaginary argument.
Can we explicitly bound $I_1$ on $[0,x]$, where $x>0$ is a real number in terms of $x$?