Geodesic
Index theory for real factors
Eurasian mathematical journal, Tome 3 (2012) no. 2, pp. 12-20.

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The notion of index for arbitrary real factors is introduced and investigated. The main tool in our approach is the reduction of real factors to involutive $*$-antiautomorphisms of their complex enveloping von Neumann algebras. Similarly to the complex case the values of the index for real factors are calculated. 
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S. Albeverio; Sh. A. Ayupov; A. A. Rakhimov; R. A. Dadakhodjaev. Index theory for real factors. Eurasian mathematical journal, Tome 3 (2012) no. 2, pp. 12-20. http://geodesic.mathdoc.fr/item/EMJ_2012_3_2_a1/

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