ISBN-13: 9783642080869 / Angielski / Miękka / 2011 / 256 str.
ISBN-13: 9783642080869 / Angielski / Miękka / 2011 / 256 str.
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.