Published online by Cambridge University Press: 18 May 2009
1. Introduction. Given a series we define , by the relations
The series Σan is said to be summable (C, k) to the sum s, if
as n→∞, and strongly summable (C, k), k>0, with index p, to the sum s, or summable [C; k, p] to the sum s, if
* Hyslop, J. M., Proc., Glasgow Math. Assoc., I., p. 16.Google Scholar
† See Lemma 2 below.
* Hardy, G. H. and Riesz, M., The General Theory of Dirichlet Series (Cambridge Tract, No. 18), 27.Google Scholar
† See, for example, Hyslop, J. M., Proc. Edinburgh Math. Soc., (2), 5 (1937), 46–54.CrossRefGoogle Scholar
‡ Kogbetliantz, E., Bull, des Sciences Math., (2), 49 (1925), 234–56.Google Scholar
§ Hyslop, J. M., loc. cit.Google Scholar
* Hardy, G. H. and Riesz, M., The General Theory of Dirichlet Series (Cambridge Tract, No. 18), 27.Google Scholar
† See, for example, Hyslop, J. M., Proc. Edinburgh Math. Soc., (2), 5 (1937), 46–54.CrossRefGoogle Scholar
‡ Kogbetliantz, E., Bull, des Sciences Math., (2), 49 (1925), 234–56.Google Scholar
§ Hyslop, J. M., loc. cit.Google Scholar
* Hobson, E. W., The Theory of Functions of a Real Variable, II (1926), 93.Google Scholar
* The term v = 0 in each of the preceding expressions is, of course, zero, and may therefore be omitted.