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This book provides a systematic approach for the algorithmic formulation and implementation of mathematical operations in computer algebra programming languages. The viewpoint is that mathematical expressions, represented by expression trees, are the data objects of computer algebra programs, and by using a few primitive operations that analyze and
Mathematica, Maple, and similar software packages provide programs that carry out sophisticated mathematical operations. Applying the ideas introduced in Computer Algebra and Symbolic Computation: Elementary Algorithms, this book explores the application of algorithms to such methods as automatic simplification, polynomial decomposition, and polyno
What is the minimum dimension of a niche space necessary to represent the overlaps among observed niches? This book presents a new technique for obtaining a partial answer to this elementary question about niche space. The author bases his technique on a relation between the combinatorial structure of food webs and the mathematical theory of interval graphs. Professor Cohen collects more than thirty food webs from the ecological literature and analyzes their statistical and combinatorial properties in detail. As a result, he is able to generalize: within habitats of a certain limited physical and temporal heterogeneity, the overlaps among niches, along their trophic (feeding) dimensions, can...
Discusses how many people the earth can support in terms of economic, physical, and environmental aspects.
Examines the structures of the economy and political system of the United States and recommends methods for reforming the American government.
However rare, some injustices are "objectively" determined, often through DNA evidence, which allows us to squarely establish innocence despite a conviction. But the stories selected for this book represent a cross-section: some are such that (almost) every reader will see and acknowledge the wrong, and some interviews may leave the readers scratching his head, wondering "what was the author thinking?" By speaking with those impacted by injustices that occurred over the last 60 years--during the 1950s at the height of McCarthyism, the 1980s in Louisiana and New York when race played a large a role in how justice was dispensed and how the media portrayed the participants, the aftermath of 9/1...
Yippee-ki-yay . . . Discover the explosive story behind the creation of the Die Hard saga in this visually stunning, behind-the-scenes look at the adventures of detective John McClane. Thirty years after the release of the groundbreaking action film, Die Hard: The Ultimate Visual History takes an in-depth look at the entire Die Hard saga, from the original movie through to the hit sequels, comics, video games, and other extensions of hero John McClane’s story. Loosely based on Roderick Thorp’s novel Nothing Lasts Forever, Die Hard, released in 1988, saw Moonlighting star Bruce Willis seamlessly make the transition from TV success to movie stardom in a film so taut, explosive, and full of...