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Excalibur by Bernard Cornwell
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Excalibur by Bernard CornwellExcalibur by Bernard Cornwell

A story of love, war, loyalty and betrayal that begins with the failure of Lancelot's rebellion and the ruin of Arthur's marriage. Sensing disunity, the Saxons declare war. However, Arthur is victorious at Mount Badon, but the promises he made come back to haunt him after years of peace and glory.
 
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Kac-Moody Algebras in M-theory
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Kac-Moody Algebras in M-theoryKac-Moody Algebras in M-theory

Contents: A First Approach; General Framework; Homogeneous Cosmologies; Oxidation; Hyperbolic Algebras; General Framework; Dirac Fermions; Eleven Dimensional Supergravity; Dualities and Signatures of G++ Invariant Theories; etc.
 
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Trigonometry Notes
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Trigonometry NotesTrigonometry Notes

From the table of contents: Review of Functions; Rational Functions; Elementary Trigonometry; Graphing Trigonometric Functions; Trigonometric Identities; Advanced Trigonometric Concepts; Triangle Trigonometry; Selected Answers to the Exercises.
 
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Smooth Differentiable Spaces
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Smooth Differentiable SpacesSmooth Differentiable Spaces

The volume develops the foundations of differential geometry so as to include finite-dimensional spaces with singularities and nilpotent functions, at the same level as is standard in the elementary theory of schemes and analytic spaces. The theory of differentiable spaces is developed to the point of providing a handy tool including arbitrary base changes, infinitesimal neighbourhoods, sheaves of relative differentials, quotients by actions of compact Lie groups and a theory of sheaves of Frechet modules paralleling the useful theory of quasi-coherent sheaves on schemes.
 
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Ubik by Philip K Dick (audiobook with text)
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UbikUbik

Written in 1969, Ubik is a futuristic science-fiction novel that transcends genre fiction. Dick's novel is dense with literary substance which has been integrated into a comprehensive universe of his own imagining.The novel takes place in 1992, in a world where nearly every convenience (even the opening of doors) costs money. In this society, the dead and the living interact with one another.Ubik integrates a series of themes – on the surface it is a light sci-fi read; by the first chapter, however, the book is infused, although not laden, with important themes and "literary significance."
 
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