# §13.22 Zeros

From (13.14.2) and (13.14.3) has the same zeros as and has the same zeros as , hence the results given in §13.9 can be adopted.

Asymptotic approximations to the zeros when the parameters and/or are large can be found by reversion of the uniform approximations provided in §§13.20 and 13.21. For example, if is fixed and is large, then the th positive zero of is given by

where is the th positive zero of the Bessel function 10.21(i)). (13.22.1) is a weaker version of (13.9.8).