Genre-defying fiction that accelerates "cross-cultural dialogue" into a kaleidoscopic rush of sensory estrangements, fairy tales, and alien encounters. "There's really no difference between us and them, so we're told…." Based on the author's experiences of living as an American in Iran, Kristen Alvanson's XYZT is a wildly imaginative dramatization of the idea of a "dialogue of civilizations" and its potentially outlandish ramifications. As part of an advanced technological test program, volunteers are shuttled back and forth between the US and Iran, hidden from the watchful eyes of immigration police and state bureaucracies. Each is given a single opportunity to be received by a local host and to have a brief authentic experience of what it means to live as “them” before being transported back home. But far from heralding the bliss of mutual recognition, the experiment unleashes a series of displacements so disorienting that the fabric of reality begins to fray. Ordinary people become entangled in extraordinary situations, and everyday life bleeds into mythological encounters, alternate universes and dark psychedelic journeys in alien lands where the real and the imaginary are indistinguishable. A treasury of tales told from multiple perspectives and in a multiplicity of styles, XYZT is an audacious cross-genre experiment, a firsthand memoir of what it means to see what "they" see, and a science-fictional, nonstandard engagement with anthropology in which cross-cultural encounters take on all the unpredictable features of a contemporary fairy tale.

Wallis's book on discrete mathematics is a resource for an introductory course in a subject fundamental to both mathematics and computer science, a course that is expected not only to cover certain specific topics but also to introduce students to important modes of thought specific to each discipline . . . Lower-division undergraduates through graduate students. —Choice reviews (Review of the First Edition) Very appropriately entitled as a 'beginner's guide', this textbook presents itself as the first exposure to discrete mathematics and rigorous proof for the mathematics or computer science student. —Zentralblatt Math (Review of the First Edition) This second edition of A Beginner’s Guide to Discrete Mathematics presents a detailed guide to discrete mathematics and its relationship to other mathematical subjects including set theory, probability, cryptography, graph theory, and number theory. This textbook has a distinctly applied orientation and explores a variety of applications. Key Features of the second edition: * Includes a new chapter on the theory of voting as well as numerous new examples and exercises throughout the book * Introduces functions, vectors, matrices, number systems, scientific notations, and the representation of numbers in computers * Provides examples which then lead into easy practice problems throughout the text and full exercise at the end of each chapter * Full solutions for practice problems are provided at the end of the book This text is intended for undergraduates in mathematics and computer science, however, featured special topics and applications may also interest graduate students.

Topics covered in Discrete Mathematics have become essential tools in many areas of studies in recent years. This is primarily due to the revolution in technology, communications, and cyber security. The book treats major themes in a typical introductory modern Discrete Mathematics course: Propositional and predicate logic, proof techniques, set theory (including Boolean algebra, functions and relations), introduction to number theory, combinatorics and graph theory.An accessible, precise, and comprehensive approach is adopted in the treatment of each topic. The ability of abstract thinking and the art of writing valid arguments are emphasized through detailed proof of (almost) every result. Developing the ability to think abstractly and roguishly is key in any areas of science, information technology and engineering. Every result presented in the book is followed by examples and applications to consolidate its comprehension. The hope is that the reader ends up developing both the abstract reasoning as well as acquiring practical skills.All efforts are made to write the book at a level accessible to first-year students and to present each topic in a way that facilitates self-directed learning. Each chapter starts with basic concepts of the subject at hand and progresses gradually to cover more ground on the subject. Chapters are divided into sections and subsections to facilitate readings. Each section ends with its own carefully chosen set of practice exercises to reenforce comprehension and to challenge and stimulate readers.As an introduction to Discrete Mathematics, the book is written with the smallest set of prerequisites possible. Familiarity with basic mathematical concepts (usually acquired in high school) is sufficient for most chapters. However, some mathematical maturity comes in handy to grasp some harder concepts presented in the book.

The Proceedings of the National Academy of Sciences (PNAS) publishes research reports, commentaries, reviews, colloquium papers, and actions of the Academy. PNAS is a multidisciplinary journal that covers the biological, physical, and social sciences.