Maximal indexes of Tits algebras
Documenta mathematica, Tome 1 (1996), pp. 229-243
Let G be a split simply connected semisimple algebraic group over a field F and let C be the center of G. It is proved that the maximal index of the Tits algebras of all inner forms of GL over all field extensions L/F corresponding to a given character χ of C equals the greatest common divisor of the dimensions of all representations of G which are given by the multiplication by χ being restricted to C. An application to the discriminant algebra of an algebra with an involution of the second kind is given.
@article{10_4171_dm_12,
author = {A.S. Merkurjev},
title = {Maximal indexes of {Tits} algebras},
journal = {Documenta mathematica},
pages = {229--243},
year = {1996},
volume = {1},
doi = {10.4171/dm/12},
url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/12/}
}
A.S. Merkurjev. Maximal indexes of Tits algebras. Documenta mathematica, Tome 1 (1996), pp. 229-243. doi: 10.4171/dm/12
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