Cyclic homology 28 Hochschild homology 12 Commutator filtration 4 Crossed products 4 Grothendieck topology 4 Hochschild (co)homology 4 Hopf crossed products 4 Monogenic extensions 4 Algebraic geometry 2 Bornological algebras 2 Calkin's theorem 2 Cleft extensions 2 Crossed product 2 Karoubi's cone 2 Operator ideal 2 Ore extensions 2 Overconvergent completions 2 Positive characteristic 2 Quantum groups 2 Rigid cohomology 2 cyclic group 2 group algebra 2