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Lajas celestes
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Matematicas 4
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La pintura mural prehispánica en México
El Seminario de Pintura Mural Prehispanica adscrito al Instituto de Investigaciones Esteticas de la UNAM, ha terminado sus trabajos en torno a Bonampak, uno de los sitios mesoamericanos mas ricos en pintura mural y tesoro artistico ampliamente valorado a nivel mundial. En esta publicacion, que presentamos con gran satisfaccion, estan a la vista los resultados de un singular esfuerzo de documentacion fotografica y dibujistica. Como bien lo explica Beatriz de la Fuente, directora del proyecto, podremos apreciar en el primer tomo que constituye el catalogo, documentacion fotografica inedita, sobre todo, acercamientos a conjuntos y detalles, asíicomo vistas de las altas bovedas de Bonampak. En ...
Bolon Tiku
La historia la escriben los vencedores y lo hacen según su conveniencia para sus fines colonizadores. Por eso, por ejemplo, gran parte de la cultura azteca permaneció oculta, hasta que M. León Portilla, en su libro Visión de los Vencidos, nos muestra una relación del testimonio histórico de los conquistados. Por lo mismo, en ningún tratado de la historia de las matemáticas y astronomía actual se mencionan los adelantos que respecto de los conocimientos astronómicos y matemáticos, se alcanzaron por las culturas antiguas que florecieron en el continente Americano, a pesar de que en algunos casos se adelantaran casi mil años a los del viejo continente, como se demuestra en la ecuaci...
Transactions of the International Astronomical Union
The XXth General Assembly of the International Astronomical Union was held in Baltimore, Maryland USA from August 02 to 11, 1988. The Inaugural Ceremony on August 02 was held in the presence of representatives of the United States Governn:ent, t~e S~ate of Maryland, the City of Baltimore and the host institution -the Johns Hopkins Umverslty- as well as of the National and Local Organising Committees. The scientific programme maintained the high standards of the Union and the scientific proceedings may be found either in this volume or in volume 8 of Highlights of Astronomy. The scientific programme was organised by the 40 Commission Presidents and coordinated by the General Secretary (1985-1988), Dr. J.-P. Swings. The local arrangements were effectively made through the National Organising Committee under the Chairmanship of Prof. F. Drake and the Local Organising Committee under the co-Chairmanship of Prof. A. Oavidsen and Dr. R. Giacconi. The smooth day to day operation of the meeting resulted from the incomparable dedication of Karen Weinstock and Harold Screen.
Transactions of the International Astronomical Union
IAU Transactions XXIIB summarizes the work of the XXIInd General Assembly. The discourses given during the Inaugural and Closing Ceremonies are reproduced in Chapters I and III, respectively. The proceedings of the two sessions of the General Assembly will be found in Chapter II, which includes the Resolutions and the report of the Finance Committee. The Statutes, Bye-Laws and a few working rules of the Union are published in Chapter IV. The Accounts and other aspects of the administration of the Union are recorded in Chapter V, together with the report of the Executive Committee for this last triennium, and provide the permanent record for the Union in the period 1991-1994. This volume also contains the Commission reports from The Hague compiled by the Presidents of the Commissions (Chapter VI). Finally, Chapter VII contains the list of countries adhering to the Union and the alphabetical, geographical and commission membership lists of about 8000 individual members. The IAU still appears to be unique among the scientific Unions in maintaining this category of individual membership which contributes in a crucial way to the spirit and the aims of the Union.
