Overview

This book provides a concrete description of the identity connected components of the real and complex exceptional Lie groups. The constructions are elementary and improve on those of H. Freudenthal. The complex simple Lie algebras were classified into classical (An, Bn, Cn, Dn) and exceptional (G2, F4, E6, E7, E8) types at the end of the 19th century by W. Killing and É. Cartan. These simple Lie algebras and the corresponding compact simple Lie groups arise in many settings in mathematics and physics. The exceptional Lie groups form an especially interesting class of objects that have attracted the attention of numerous mathematicians. Requiring no prior knowledge of composition algebras or Jordan algebras, the book will be valuable to anyone who wants to learn about the structure and realizations of these fascinating groups.

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9783031889103

Table of Contents

Reviews

“Each chapter follows a consistent structure ... . The presentation is algebraically rigorous yet elementary in spirit, avoiding reliance on general structural theory in favor of concrete constructions. This makes the volume a valuable resource for researchers seeking hands-on realizations of exceptional groups and their substructures, as well as for physicists interested in their symmetry properties, particularly in connection with grand unified theories and string-theoretic models. ” (Egle Bettio, zbMATH 1569.22002, 2026)

Author Information

Ichiro Yokota was awarded a Doctor of Science degree (Topology of classical Lie groups) from Osaka University  in 1959. He was an Assistant, Lecturer and then Associate Professor at Osaka City University (1950–1966), Professor at Shinshu University (1966–1990) and Visiting Professor at Tamkang University (1976–1977). In 1990, he became a Professor Emeritus at Shinshu University. With O. Shukuzawa, he realized the non-compact connected and compact simply connected exceptional Lie groups of type E6 (1979–1980), improving on H. Freudenthal’s constructions. His publications include the book ""Groups and Topology” (Shokabo, 1971) on cellular decompositions of classical Lie groups. Professor Yokota died on November 10th, 2017. The editors of this book have been disciples of the late Professor since 1976. In his words, “Our motivation is to study everything related to exceptional Lie groups”.

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