eBay is overwhelmingly the most familiar and successful online auction marketplace. This is due to the vision of a San Diego, Ca., resident, Pierre Omidyar, who started the company in the living room of his home in 1995 with the help of Jeff Skoll. Initially, the two men dealt only in collectible items but felt there was a vast untapped market that they could reach. In 1998, Omidyar and Skoll brought Meg Whitman into the fold. The rest of the story is an example of unimaginable success. Whitman, who had studied at Harvard Business School and was well-versed in branding at companies such as Hasbro, recruited a marketing staff that had an average 20 years' experience per person. Their collective vision and passion have paid off wildly. According to the 2014 Forbes 2000 list, eBay is worth $71.01 billion. Brand recognition is one of the reasons eBay is an excellent venue source for people who want to make money online. Its sheer magnitude of its brand almost ensures that potential customers will visit the eBay website before going elsewhere.
This 2004 textbook fills a gap in the literature on general relativity by providing the advanced student with practical tools for the computation of many physically interesting quantities. The context is provided by the mathematical theory of black holes, one of the most elegant, successful, and relevant applications of general relativity. Among the topics discussed are congruencies of timelike and null geodesics, the embedding of spacelike, timelike and null hypersurfaces in spacetime, and the Lagrangian and Hamiltonian formulations of general relativity. Although the book is self-contained, it is not meant to serve as an introduction to general relativity. Instead, it is meant to help the reader acquire advanced skills and become a competent researcher in relativity and gravitational physics. The primary readership consists of graduate students in gravitational physics. It will also be a useful reference for more seasoned researchers working in this field.
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