TY - BOOK AU - ED - SpringerLink (Online service) TI - Hyperbolic Geometry T2 - Springer Undergraduate Mathematics Series, SN - 9781846282201 AV - QA440-699 U1 - 516 23 PY - 2005/// CY - London PB - Springer London KW - Mathematics KW - Geometry KW - Mathematics, general N1 - The Basic Spaces -- The General Mȵbius Group -- Length and Distance in ? -- Planar Models of the Hyperbolic Plane -- Convexity, Area, and Trigonometry -- Nonplanar models; ZDB-2-SMA N2 - The geometry of the hyperbolic plane has been an active and fascinating field of mathematical inquiry for most of the past two centuries. This book provides a self-contained introduction to the subject, suitable for third or fourth year undergraduates. The basic approach taken is to define hyperbolic lines and develop a natural group of transformations preserving hyperbolic lines, and then study hyperbolic geometry as those quantities invariant under this group of transformations. Topics covered include the upper half-plane model of the hyperbolic plane, Mȵbius transformations, the general Mȵbius group, and their subgroups preserving the upper half-plane, hyperbolic arc-length and distance as quantities invariant under these subgroups, the PoincarȨ disc model, convex subsets of the hyperbolic plane, hyperbolic area, the Gauss-Bonnet formula and its applications. This updated second edition also features: an expanded discussion of planar models of the hyperbolic plane arising from complex analysis; the hyperboloid model of the hyperbolic plane; brief discussion of generalizations to higher dimensions; many new exercises. The style and level of the book, which assumes few mathematical prerequisites, make it an ideal introduction to this subject and provides the reader with a firm grasp of the concepts and techniques of this beautiful part of the mathematical landscape UR - http://dx.doi.org/10.1007/1-84628-220-9 ER -