%0 Journal Article %T Twisting algebras using non-commutative torsors %A Pierre Guillot %A Christian Kassel %A Akira Masuoka %J Mathematics %D 2009 %I arXiv %R 10.1007/s00209-011-0891-x %X Non-commutative torsors (equivalently, two-cocycles) for a Hopf algebra can be used to twist comodule algebras. After surveying and extending the literature on the subject, we prove a theorem that affords a presentation by generators and relations for the algebras obtained by such twisting. We give a number of examples, including new constructions of the quantum affine spaces and the quantum tori. %U http://arxiv.org/abs/0911.5287v3