Geodesic
Index of real subfactors of W*-algebras
Dalʹnevostočnyj matematičeskij žurnal, Tome 20 (2020) no. 2, pp. 234-246.

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The index of a real subfactor is defined and the set of possible values of index is found. It is proved, that some properties of an index truly also in a real case, and properties which are not true for real subfactors are shown. By means of examples for each pair C*-algebras $N\subset M$ schemes of construction of graph are given. 
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A. A. Rakhimov; Kh. Kh. Boltaev. Index of real subfactors of W*-algebras. Dalʹnevostočnyj matematičeskij žurnal, Tome 20 (2020) no. 2, pp. 234-246. http://geodesic.mathdoc.fr/item/DVMG_2020_20_2_a11/

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