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Generators and Relations in Groups and Geometries : NATO SCIENCE SERIES SERIES C: MATHEMATICAL AND PHYSICAL SCIENCES - A. Barlotti

Generators and Relations in Groups and Geometries

NATO SCIENCE SERIES SERIES C: MATHEMATICAL AND PHYSICAL SCIENCES

By: A. Barlotti (Editor), E.W. Ellers (Editor), P. Plaumann (Editor), K. Strambach (Editor)

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Published: 28th February 1991
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Every group is represented in many ways as an epimorphic image of a free group. It seems therefore futile to search for methods involving generators and relations which can be used to detect the structure of a group. Nevertheless, results in the indicated direction exist. The clue is to ask the right question. Classical geometry is a typical example in which the factorization of a motion into reflections or, more generally, of a collineation into central collineations, supplies valuable information on the geometric and algebraic structure. This mode of investigation has gained momentum since the end of last century. The tradition of geometric-algebraic interplay brought forward two branches of research which are documented in Parts I and II of these Proceedings. Part II deals with the theory of reflection geometry which culminated in Bachmann's work where the geometric information is encoded in properties of the group of motions expressed by relations in the generating involutions. This approach is the backbone of the classification of motion groups for the classical unitary and orthogonal planes. The axioms in this char- acterization are natural and plausible. They provoke the study of consequences of subsets of axioms which also yield natural geometries whose exploration is rewarding. Bachmann's central axiom is the three reflection theorem, showing that the number of reflections needed to express a motion is of great importance.

I Optimal factorization of matrices, length problems.- I.1 Classical group.- I.2 Generators of automorphism groups of module.- I.3 Generators of automorphism groups of Cayley algebra.- I.4 Products of matrice.- II Reflection geometry.- II.1 Reflection groups - On pre-Hjelmslev groups and related topic.- II.2 Unitary geometry.- II.3 Lie and algebraic Johnsen group.- III Nice generators and relations, applications.- III.1 2-Generation of finite simple groups and some related topic.- III.2 Coxeter groups and three related topic.- III.3 Geometric structure of conjugacy classes in algebraic group.- III.4 Groups with polynomial growth and differential geometry.- III.5 Analyticity and growth of pro p-group.- III.6 Intersections of local algebraic extensions of a Hilbertian fiel.- III.7 Generators and relations for discontinuous group.

ISBN: 9780792311614
ISBN-10: 0792311612
Series: NATO SCIENCE SERIES SERIES C: MATHEMATICAL AND PHYSICAL SCIENCES
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 447
Published: 28th February 1991
Publisher: Springer
Country of Publication: NL
Dimensions (cm): 23.5 x 15.5  x 2.5
Weight (kg): 1.83