The function has one real zero , given by
and each have an infinite number of positive real
zeros, which are denoted by , , respectively, arranged in ascending
order of absolute value for . Values of and to
30D are given by MacLeod (1996b).
where for , and for
. For these results, together with the next three terms in
(6.13.2), see MacLeod (2002a). See also
Riekstynš (1991, pp. 176–177).