Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twisted gamma filtration and algebras with orthogonal involution   For the Grothendieck group of a split simple linear algebraic group, the
twisted gamma-filtration provides a useful tool for constructing torsion
elements in gamma-rings of twisted flag varieties. In this paper, we construct
a non-trivial torsion element in the gamma-ring of a complete flag variety
twisted by means of a PGO-torsor. This generalizes the construction in the
HSpin case previously obtained by Zainoulline. We use this torsion element to
study algebras with orthogonal involutions.

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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph