# Notations Y

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$\mathop{y_{\nu,m}\/}\nolimits$
zeros of the Bessel function $\mathop{Y_{\nu}\/}\nolimits\!\left(x\right)$; §10.21(i)
$\mathop{{y^{\prime}_{\nu,m}}\/}\nolimits$
zeros of the Bessel function derivative $\mathop{Y_{\nu}\/}\nolimits'\!\left(x\right)$; §10.21(i)
$\mathop{Y_{\nu}\/}\nolimits\!\left(z\right)$
Bessel function of the second kind; 10.2.3
$y_{n}(x)=\mathop{y_{n}\/}\nolimits\!\left(x;2\right)$
other notation; 18.34.2
$\mathop{\widetilde{Y}_{\nu}\/}\nolimits\!\left(x\right)$
Bessel function of imaginary order; 10.24.2
$y_{n}(z)=\mathop{\mathsf{y}_{n}\/}\nolimits\!\left(z\right)$
notation used by Abramowitz and Stegun (1964); §10.1
$\mathop{\mathsf{y}_{n}\/}\nolimits\!\left(z\right)$
spherical Bessel function of the second kind; 10.47.4
$\mathop{y_{n}\/}\nolimits\!\left(x;a\right)$
Bessel polynomial; 18.34.1
$\mathop{Y_{{l},{m}}\/}\nolimits\!\left(\theta,\phi\right)$
spherical harmonic; 14.30.1
$\mathop{Y_{l}^{m}\/}\nolimits\!\left(\theta,\phi\right)$
surface harmonic of the first kind; 14.30.2
$y_{n}(x;a,b)=\mathop{y_{n}\/}\nolimits\!\left(2x/b;a\right)$
other notation; 18.34.3