Published online by Cambridge University Press: 24 October 2008
1. In the present note we obtain the postulation of a multiple surface of S4 for primals of sufficiently high order; the method is that previously used by Campedelli to determine the postulation of a multiple curve of S3.
* Campedelli, , Rend. Palermo, 55 (1931), 198.CrossRefGoogle Scholar
† Segre, B., Rend. Lincei (6), 22 (1934), 488.Google Scholar The lemma states that, if |C| is a regular system of curves of dimension greater than zero, and D an irreducible curve, not common to all the curves C, and variable in a continuous system, then, if the sum of the series cut out on D by | C | and the characteristic series on D is non-special, the system |C + D| is regular.
* Severi, , Memorie Acc. Torino (2), 52 (1903), 61.Google Scholar
† Severi, op. cit.
* Noether, , Annali di Mat. (2), 5 (1871), 163.CrossRefGoogle Scholar
* Severi, op. cit.