Introduction to Logic and mathematical hobbyists will find

and mathematical hobbyists will find well-organized coverage of the fundamentals of graph theory in this highly readable and thoroughly enjoyable book

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The vibrant Old Norse poems in this collection

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Introduction to Logic and mathematical hobbyists will findPart I of this coherent, well organized text deals with formal principles of inference and definition. Part II explores elementary intuitive set theory, with separate chapters on sets, relations, and functions. Ideal for undergraduates. Reprint of the Van Nostrand Reinhold Company, New York, 1957 edition.