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Witt's theorem for noncommutative conics
Let k be a field. We show that all homogeneous noncommutative curves of genus
zero over k are noncommutative P^1-bundles over a (possibly) noncommutative
base. Using this result, we compute complete isomorphism invariants of
homogeneous noncommutative curves of genus zero, allowing us to generalize a
theorem of Witt.Comment: Section two generalize
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