Note by the Secretariat

Includes bibliography

Calendario de reuniones intergubernamentales de la CEPAL propuesto para el período 1982-1984: nota de la Secretaría = Calendar of intergovernmental meetings of CEPAL proposed for the period 1982-1984: note by the Secretariat

Incluye las reuniones estatutorias de la CEPAL, reuniones de organos subsidiarios de la Comision y reuniones regionales latinoamericanas preparatorias para conferencias mundiales de las Naciones Unidas.

Note on the nonuniqueness of the massive Fierz-Pauli theory and spectator fields

It is possible to show that there are three independent families of models describing a massive spin-2 particle via a rank-2 tensor. One of them contains the massive Fierz-Pauli model, the only case described by a symmetric tensor. The three families have different local symmetries in the massless limit and can not be interconnected by any local field redefinition. We show here, however, that they can be related with the help of a decoupled and nondynamic (spectator) field. The spectator field may be either an antisymmetric tensor B μν=-Bνμ, a vector Aμ or a scalar field φ, corresponding to each of the three families. The addition of the extra field allows us to formulate master actions which interpolate between the symmetric Fierz-Pauli theory and the other models. We argue that massive gravity models based on the Fierz-Pauli theory are not expected to be equivalent to possible local self-interacting theories built up on top of the two new families of massive spin-2 models. The approach used here may be useful to investigate dual (nonsymmetric) formulations of higher-spin particles. © 2013 American Physical Society.

Nota de la Secretaría de la CEPAL sobre la Cuarta Conferencia Regional sobre la Integración de la Mujer en el Desarrollo Económico y Social de América Latina y el Caribe = Note by the Secretariat of ECLAC on the Fourth Regional Conference on the Integration of Women into the Economic and Social Development of Latin America and the Caribbean

Incluye Bibliografía

Secretariat note on proposal for a multi-national enterprise in fishing for the CDCC countries

Expone los antecedentes de un proyecto regional de desarrollo de la industria pesquera para los paises del CDCC. Contiene un breve informe sobre la situacion existente de la pesqueria en Barbados, Republica Dominicana, Montserrat y San Cristobal-Nieves.

Nota sobre los aspectos económicos de la urbanización en América Latina = Note on the economics of urbanization in Latin America

Los documentos del Seminario fueron publicados por UNESCO en 1961 con el título: La urbanización en América Latina/Urbanization in Latin America