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math.QA2008
Associative algebra deformations of the Connes-Moscovici's Hopf algebra
Alice Fialowski, Friedrich Wagemann
We compute the second Hochschild cohomology space of Connes-Moscovici's Hopf algebra , giving the infinitesimal deformations (up to equivalence…
math.QA2006★ 22 cited
Global Geometric Deformations of the Virasoro algebra, current and affine algebras by Krichever-Novikov type algebra
Alice Fialowski, Martin Schlichenmaier
In two earlier articles we constructed algebraic-geometric families of genus one (i.e. elliptic) Lie algebras of Krichever-Novikov type. The considered algebras are vector fields,…