# §13.1 Special Notation

(For other notation see Notation for the Special Functions.)

 integer. nonnegative integers. real variables. complex variable. arbitrary small positive constant. Euler’s constant (§5.2(ii)). Gamma function (§5.2(i)). .

The main functions treated in this chapter are the Kummer functions and , Olver’s function , and the Whittaker functions and .

Other notations are: 16.2(i)) and (Humbert (1920)) for ; (Erdélyi et al. (1953a, §6.5)) for ; (Olver (1997b, p. 256)) for ; (Buchholz (1969, p. 12)) for .

For an historical account of notations see Slater (1960, Chapter 1).