Key points are not available for this paper at this time.
(4) M (v) + O and n like adpoint conditions (5) V1 (v) O, V2 (v) °, 2 V (e) For certain characteristic valqbes of the conlplex parameter X there will exist *The second part of a paper presented to the Society (Chicago), March 30, 1907, under a different title. The first part of this paper has been printed on pages 219-231 of this volume. Received for publication May 12, 1908. t It ia not an erential generalization to write iIlstead of (2)
George D. Birkhoff (Wed,) studied this question.