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Beskrivelse
A very clear account of the subject from the viewpoints of elementary geometry, Riemannian geometry and group theory - a book with no rival in the literature. Mostly accessible to first-year students in mathematics, the book also includes very recent results which will be of interest to researchers in this field. 1 Paperback / softback 10 Illustrations, black and white; IX, 256 p. 10 illus.