Held from 25 to 28 of October, 1967, this second Colloquium coincided in the time with the “VIII Reunión Anual de Matemáticos Españoles”, supported and organized by the Real Sociedad Matemática Española. It is specially remarkable that the “Internacional Mathematical Union” (IMU) has collaborated in the financial support of this Colloquium.
The number of participants was 32, coming from 6 different countries (Argentine, Belgium, France, Great Britain, Spain and Switzerland), and there were 11 plenary lectures.
Again, the proceedings of this Colloquium were published in the series “Congresos e Coloquios” of the University of Santiago de Compostela in 1968, and there are collected the articles of M. Berger (France), L. Godeaux (Belgium), A. Lichnerowicz (France), G. de Rham (Switzerland), J. Sancho San Román (Spain), L.A. Santaló (Argentine), E. Vidal Abascal (Spain), J.L. Viviente (Spain) and T.J. Willmore (Great Britain); the lectures given by R. Deheuvels (France) and B. Eckmann (Switzerland) were not included.