If and the upper signs are taken, then the restriction on
The restriction is unnecessary when and is an
For results analogous to (10.23.7) and (10.23.8) see
Watson (1944, §§11.3 and 11.41).
where is Euler’s constant and
For collections of sums and series involving modified Bessel functions see
Erdélyi et al. (1953b, §7.15), Hansen (1975), and
Prudnikov et al. (1986b, pp. 691–700).