ta^2}{\chi_B} K,\qquad
         C_\parallel^2/C_\perp^2\approx 1/2.$</td>
    </tr>
</table>

<p>Transverse spin-wave velocities at $T/T_c\approx0$ was measured
in Zajalov-2015. This measurements was used to extract value of $F^1_a$.
The functions for spin-wave velocities use this value, and thus agree with
the experiment.

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