| 11. | Another topological proof, based on the Bass Serre theory of group actions on trees, was published by.
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| 12. | He worked on symmetric products of algebraic curves, Jordan algebras and the representation theory of groups over local fields.
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| 13. | The traditional theory of groups can be divided into two basic variants which are briefly introduced in the following section.
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| 14. | For his contributions to von Neumann algebras and representation theory of groups, he was awarded a 2012 EMS Prize.
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| 15. | There is quite a refined theory of group schemes, that enters for example in the contemporary theory of abelian varieties.
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| 16. | In 1931 he published a translation of Weyl's " The Theory of Groups and Quantum Mechanics ".
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| 17. | It is easily seen from the basic theory of group actions on trees that uniform tree lattices are virtually free groups.
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| 18. | Both HNN-extensions and amalgamated free products are basic building blocks in the Bass Serre theory of groups acting on trees.
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| 19. | Several theorems bear his name, including Brauer's characterization of characters, which is central to the theory of group characters.
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| 20. | Malcev algebras play a role in the theory of Moufang loops that generalizes the role of Lie algebras in the theory of groups.
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