Invariants, torsion indices and oriented cohomology of complete flags
Baptiste Calmès, Viktor Petrov, Kirill Zainoulline (2013)
Annales scientifiques de l'École Normale Supérieure
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Let be a split semisimple linear algebraic group over a field and let be a split maximal torus of . Let be an oriented cohomology (algebraic cobordism, connective -theory, Chow groups, Grothendieck’s , etc.) with formal group law . We construct a ring from and the characters of , that we call a formal group ring, and we define a characteristic ring morphism from this formal group ring to where is the variety of Borel subgroups of . Our main result says that when the...