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Bella lives in extreme poverty in Tijuana, Mexico, with her young mother in a village of cardboard boxes. When she is five, a severe rainstorm causes the box that she and her mother are living in to slide down the hill and onto a road that leads to the border. As Bella struggles to save herself, an American family traveling to their beach house in Baja finds her and pulls her from the mud. The family is asked by one of the village rescuers to care for Bella for a week until her mother can be found. When a well-fed, well-scrubbed Bella and the American family return to Tijuana, though, her mother has vanished. The family must make a decision whether to leave Bella at the Tijuana orphanage in ...
This book, published in 1995, is intended to celebrate the 25th anniversary of the conclusion of the Patent Cooperation Treaty.
This book is the result of fifteen years of studies on art, in collaboration with mathematicians (in particular Jean-Paul Guichard and the IREM of Poitiers). Until the Renaissance, the composition of painting and architecture was based on a specific geometry, called with the eyes. Its adventure began before writing, and books report nothing about. This practice avoids calculation for fear of scaring numbers, thanks to a grid where the figures are constructed. Thales, like many Greek philosophers, went to Egypt to learn it - he will give his name to the axioms. Then, all the properties are demonstrated with visual evidences, qualified as monstrations, in particular the four manifestations of the golden ratio in the triangle 3-4-5. This book offers a rich pedagogical material, as well as a solid basis for reflection on art and history. Rublev, Botticelli and Dürer are the great masters of this art. The color images for the screen, and the B/W for print, are accessible on the Internet.