## Publisher description for Classical geometries in modern contexts : geometry of real inner product spaces / Walter Benz.

Bibliographic record and links to related information available from the Library of Congress catalog

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This book is based on real inner product spaces X of arbitrary (finite or infinite) dimension greater than or equal to 2. With natural properties of (general) translations and general distances of X euclidean, hyperbolic translations and distances, respectively, are characterized. For these spaces X also the sphere geometries of MÃ¶bius and Lie are studied (besides euclidean and hyperbolic geometry), as well as geometries where Lorentz transformations play the key role. The geometrical notions of this book are based on general spaces X as described. This implies that also mathematicians who have not so far been especially interested in geometry may study and understand great ideas of classical geometries in modern and general contexts.

Proofs of newer theorems, characterizing isometries and Lorentz transformations under mild hypotheses are included, like for instance infinite dimensional versions of famous theorems of A.D. Alexandrov on Lorentz transformations. A real benefit is the dimension-free approach to important geometrical theories. Only prerequisites are basic linear algebra and basic 2- and 3-dimensional real geometry.

Library of Congress subject headings for this publication:

Functional equations.

Conformal geometry.

Lie algebras.

Complexes.

General relativity (Physics)